I looked up the link you shared and checked out the BUPLABS mount, I thought man that's a bit pricey, but I pulled the trigger and I'm impressed with the look, feel and position of the Varia now. works like a champ and seems very well made. my only mounting issue is with the supplied little rubber bits for the set rail. I trimmed them and used a single wrap of electrical tape to keep it in place and then installed the mount. thanks OP great piece of kit.