We also had a couple more BAG motors fail over the weekend, and replaced them with RS550s. There is now only one BAG on the machine, and we will swap it out during our unbagging window before our next district event (since we bought all of our BAGs in a couple of bulk purchases, the odds seem fairly high that it will fail eventually).
We 3D printed ABS spacers to help pilot the 550s into the VersaPlanetary motor plate since even when we followed the directions as closely as possible, we were unable to obtain a gearbox that didn't bind, make clicking noises, or wobble when run. The issue (I think) is that mounting the motor concentric to the motor plate is difficult because the holes are too large to pilot the RS550's M3 bolts. Leaving the motor bolts loose ensured that we ran without binding or clicking, but resulted in a vibrating motor.
Regardless, with the spacers, installing a 550 is a breeze and everything runs smooth as butter. The VersaPlanetaries are a fantastic gearbox once you get them together! There's a reason 341 has 5 of them on our robot
I realize there is nothing you guys can do about the BAG motors without some failed units, so I will make some time this week to round up our problematic ones and send them your way.