I double checked the bearing holders on both chassis when adjusting the spacers, and they are both in the lower position.

I don't have the cool ride height gauge like you, yet, but my pinion tool from Kyosho is just over 2mm thick, then I use razor blades that are 0.5mm thick to check from there, then use 0.1mm plastic card stock to TRY to get exact. IF I wanted to try to shim the T plate, what is the best material to shim with? I think I still have a broken carbon T plate. Would that work? They are both driving good, but we're always looking to shave time, right.
I couldn't find the larger spacers you were talking about, so I went back to the box my last RTR came in and found a bag of parts stuck to the packaging, and it had 2 of the spacers in it! So on the 94mm chassis I just have 1- 0.8 and 0.5 above the knuckle which leaves me with 2.2mm all the way around. It drives great with no traction rolls or chattering. Hope to get some better times!!!
Yea, back problems just down right suck! I was diagnosed with Degenerative Disk Disease when I was 24 after 5 spinal surgeries in 2 years! So I was put on long term disability and became a stay at home Dad, which was awesome and about the only good thing about it! 20+ years later I'm still walking, but I have to be very careful in what I do, as this disk slipped by reaching to open a drawer at knee height. So finding Mini-z's and Yall are a God send for my sanity!
Thanks Again for EVERYTHING! Drew
p.s. I flipped the bearing holders around. I must have been sleep deprived when I was putting it together.