Question DIY 3DOF (actuator) with Traction loss

When using this, which version of SMC3 code would you recommend? Seems there are so many variants on the FAQ I think I am using v1.01 of smc3 utilities

I looked through the thread you pointed out, and user Squarebob built a completely different type of platform than the one you want to build.
Squarebob built a typical 2DOF in which the entire weight rests on the joint (red circle in the photo I am attaching) and the motors only have to balance the partial weight when the platform tilts.
In your case, the motors have to lift the entire weight. Take my word for it, you can't build a working platform with three 200W motors. Maybe if you use very short arms, 2-4 cm, it will work, but then the range of motion will be very small.

That's fine with me if the range of motion is small, this is why I incorporated slots on my levers, so I am able to adjust base on what my motors are capable of. I am not an electrical engineer, so the electronics side I am struggling with. My goal is to get that side working, then upgrade where necessary. One thing I won't forfeit is I want 3DOF on this platform, Pitch/Roll/Heave, then I will add in the lower frame for traction loss.

Just as a test yesterday I found two issues; a) the potentiometers I had were causing the weird erratic behavior. I tested this by wiring in 10k contact pots I had and the issue was gone.
b) I had another IBT go bad during initial testing, and then another during yesterdays testing. I did slide my links all the way down into my levers making them about 2.5” C-C and with two motors running it seems capable of holding my weight and running properly. The weak point in that test was the other IBT that died. It seems like one channel burned out because it would go one direction but not the opposite anymore.

I also went ahead and moved the 3rd motor to a separate arduino and overall performance was much better. The only part that was difficult about that was figuring out how to assign the axis correctly to make the motion work right. (I set it like this A[<Axis3a>] or however it is formatted I changed 1-4,2-5,3-6, and it started working how I needed)

is there an easier way to go between arduinos in smc3 utilities? Currently having to switch the COM port text when going between arduinos

I appreciate everyone’s help and patience with this project.