V-Core 500 3.0 -- 3.1 Upgrade Woes

Beware of generic kits claiming to be V-Core 3.0 -> 3.1 upgrades. The joiner plates were for a 3.0 even though they stated 3.1 joiner plates. The flanges on the F695ZZ bearings were so rough they acted like grinders on the belt edges. Significant wear after one 60 minute print (note: have over 400 hours of printing on the old idlers and pulleys with almost no wear at all).