diff --git a/elastic.sh b/elastic.sh
index 290653f..a36549d 100755
--- a/elastic.sh
+++ b/elastic.sh
@@ -4,6 +4,7 @@ set -o pipefail
 
 _here=`dirname $(realpath $0)`
 apt_sync="${_here}/apt-sync.py" 
+yum_sync="${_here}/yum-sync.py"
 
 BASE_URL=${TUNASYNC_UPSTREAM_URL:-"https://artifacts.elastic.co"}
 
@@ -15,8 +16,6 @@ ELASTIC_VERSION=("5.x" "6.x" "7.x")
 YUM_PATH="${BASE_PATH}/yum"
 APT_PATH="${BASE_PATH}/apt"
 
-mkdir -p ${YUM_PATH} ${APT_PATH}
-
 # =================== APT repos ===============================
 
 for elsver in "${ELASTIC_VERSION[@]}"; do
@@ -26,33 +25,10 @@ for elsver in "${ELASTIC_VERSION[@]}"; do
 done
 
 # # ================ YUM/DNF repos ===============================
+components="${ELASTIC_VERSION[@]}"
+components=${components// /,}
+"$yum_sync" "${BASE_URL}/packages/@{comp}/yum" 7 "$components" x86_64 "elastic-@{comp}" "$YUM_PATH"
 
-cache_dir="/tmp/yum-elastic-cache/"
-cfg="/tmp/yum-elastic.conf"
-cat <<EOF > ${cfg}
-[main]
-keepcache=0
-
-EOF
-
-for elsver in "${ELASTIC_VERSION[@]}"; do
-cat <<EOF >> ${cfg}
-[elastic-${elsver}]
-name=elastic stack ${elsver} packages
-baseurl=${BASE_URL}/packages/${elsver}/yum
-repo_gpgcheck=0
-gpgcheck=0
-enabled=1
-sslverify=0
-
-EOF
+for elsver in ${ELASTIC_VERSION[@]}; do
+	(cd ${BASE_PATH}/${elsver}; ln -sfn ../yum/elastic-${elsver} yum)
 done
-
-if [[ -z ${DRY_RUN:-} ]]; then
-	reposync -c $cfg -d -p ${YUM_PATH} -e ${cache_dir}
-	for elsver in ${ELASTIC_VERSION[@]}; do
-		createrepo --update -v -c ${cache_dir} -o ${YUM_PATH}/elastic-${elsver}/ ${YUM_PATH}/elastic-${elsver}/
-		(cd ${BASE_PATH}/${elsver}; ln -sfn ../yum/elastic-${elsver} yum)
-	done
-fi
-rm $cfg
diff --git a/erlang.sh b/erlang.sh
index a4bd483..a1514d5 100755
--- a/erlang.sh
+++ b/erlang.sh
@@ -4,6 +4,7 @@ set -o pipefail
 
 _here=`dirname $(realpath $0)`
 apt_sync="${_here}/apt-sync.py" 
+yum_sync="${_here}/yum-sync.py"
 
 BASE_PATH="${TUNASYNC_WORKING_DIR}"
 BASE_URL="https://packages.erlang-solutions.com"
@@ -12,8 +13,6 @@ YUM_PATH="${BASE_PATH}/centos"
 UBUNTU_PATH="${BASE_PATH}/ubuntu"
 DEBIAN_PATH="${BASE_PATH}/debian"
 
-EL_VERSIONS=("6" "7" "8")
-
 # =================== APT repos ===============================
 "$apt_sync" "${BASE_URL}/ubuntu" @ubuntu-lts contrib amd64,i386 "$UBUNTU_PATH"
 echo "Ubuntu finished"
@@ -21,28 +20,5 @@ echo "Ubuntu finished"
 echo "Debian finished"
 
 # =================== YUM repos ===============================
-
-cache_dir="/tmp/yum-erlang-cache/"
-cfg="/tmp/yum-erlang.conf"
-cat <<EOF > ${cfg}
-[main]
-keepcache=0
-
-EOF
-
-for elver in ${EL_VERSIONS[@]}; do
-cat << EOF >> $cfg
-[$elver]
-name=Elang for el-${elver}
-baseurl=${BASE_URL}/rpm/centos/$elver/x86_64
-enabled=1
-EOF
-done
-
-if [[ -z ${DRY_RUN:-} ]]; then
-	reposync -c $cfg -d -p ${YUM_PATH} -e $cache_dir
-	for elver in ${EL_VERSIONS[@]}; do
-		createrepo --update -v -c $cache_dir -o ${YUM_PATH}/${elver}/ ${YUM_PATH}/${elver}/
-	done
-fi
-rm $cfg
+"$yum_sync" "${BASE_URL}/rpm/centos/@{os_ver}/@{arch}" 6-8 erlang x86_64 "@{os_ver}" "$YUM_PATH"
+echo "YUM finished"
diff --git a/influxdata.sh b/influxdata.sh
index 3c2490e..0d66562 100755
--- a/influxdata.sh
+++ b/influxdata.sh
@@ -5,6 +5,7 @@ set -o pipefail
 
 _here=`dirname $(realpath $0)`
 apt_sync="${_here}/apt-sync.py" 
+yum_sync="${_here}/yum-sync.py"
 
 BASE_PATH="${TUNASYNC_WORKING_DIR}"
 BASE_URL=${TUNASYNC_UPSTREAM_URL:-"https://repos.influxdata.com"}
@@ -13,10 +14,6 @@ YUM_PATH="${BASE_PATH}/yum"
 UBUNTU_PATH="${BASE_PATH}/ubuntu"
 DEBIAN_PATH="${BASE_PATH}/debian"
 
-EL_VERSIONS=("6" "7" "8")
-
-mkdir -p ${YUM_PATH} ${UBUNTU_PATH} ${DEBIAN_PATH}
-
 wget -O ${BASE_PATH}/influxdb.key ${BASE_URL}/influxdb.key
 
 # =================== APT repos ===============================
@@ -28,28 +25,5 @@ echo "Debian finished"
 
 
 # =================== YUM/DNF repos ==========================
-
-cache_dir="/tmp/yum-influxdata-cache/"
-cfg="/tmp/yum-influxdata.conf"
-cat <<EOF > ${cfg}
-[main]
-keepcache=0
-
-EOF
-
-for elver in ${EL_VERSIONS[@]}; do
-cat << EOF >> $cfg
-[el${elver}-x86_64]
-name=el${elver}
-baseurl=${BASE_URL}/rhel/$elver/x86_64/stable/
-enabled=1
-EOF
-done
-
-if [[ -z ${DRY_RUN:-} ]]; then
-	reposync -c $cfg -d -p ${YUM_PATH} -e $cache_dir
-	for elver in ${EL_VERSIONS[@]}; do
-		createrepo --update -v -c $cache_dir -o ${YUM_PATH}/el${elver}-x86_64/ ${YUM_PATH}/el${elver}-x86_64/
-	done
-fi
-rm $cfg
+"$yum_sync" "${BASE_URL}/rhel/@{os_ver}/@{arch}/stable/" 6-8 influxdata x86_64 "el@{os_ver}-@{arch}" "$YUM_PATH"
+echo "YUM finished"
diff --git a/virtualbox.sh b/virtualbox.sh
index a313e79..4977cf8 100755
--- a/virtualbox.sh
+++ b/virtualbox.sh
@@ -5,6 +5,7 @@ set -o pipefail
 
 _here=`dirname $(realpath $0)`
 apt_sync="${_here}/apt-sync.py" 
+yum_sync="${_here}/yum-sync.py"
 
 MAX_RETRY=${MAX_RETRY:-"3"}
 DOWNLOAD_TIMEOUT=${DOWNLOAD_TIMEOUT:-"1800"}
@@ -15,37 +16,10 @@ BASE_PATH="${TUNASYNC_WORKING_DIR}"
 RPM_PATH="${BASE_PATH}/rpm"
 APT_PATH="${BASE_PATH}/apt"
 
-EL_VERSIONS=("5" "6" "7" "8")
-
-mkdir -p ${RPM_PATH} ${APT_PATH}
-
 # === download rhel packages ====
-cache_dir="/tmp/yum-virtualbox-el-cache/"
-cfg="/tmp/virtualbox-el-yum.conf"
-cat <<EOF > ${cfg}
-[main]
-keepcache=0
 
-EOF
-
-for releasever in ${EL_VERSIONS[@]}; do
-cat <<EOF >> ${cfg}
-[el${releasever}]
-name=Oracle Linux / RHEL / CentOS-5 / x86_64 - VirtualBox
-baseurl=${BASE_URL}/rpm/el/$releasever/x86_64
-repo_gpgcheck=0
-gpgcheck=0
-enabled=1
-EOF
-done
-
-if [[ -z ${DRY_RUN:-} ]]; then
-	reposync -c $cfg -d -p ${RPM_PATH} -e $cache_dir
-	for releasever in ${EL_VERSIONS[@]}; do
-		createrepo --update -v -c $cache_dir -o ${RPM_PATH}/el$releasever ${RPM_PATH}/el$releasever
-	done
-fi
-rm $cfg
+"$yum_sync" "${BASE_URL}/rpm/el/@{os_ver}/@{arch}" 5-8 VirtualBox x86_64 "el@{os_ver}" "$YUM_PATH"
+echo "YUM finished"
 
 # === download deb packages ====