Alright, here is the finished sensor calibration jig. Ended up being about $25 for all the PVC and hardware. The gimbals are 1/2" CPVC, the base is 3/4" CPVC, and the rest is various nylon locking nuts, bolts, and spacers. The long piece through the middle of the sensor base is 1/4"-20 all-thread. I bought a 12" piece and used a hacksaw to shorten it to about 6". Now I just need to modify the FreeIMU calibration GUI tool and bit to accept inputs from my BlueTooth software serial port and I should be good to go. It stands just over 12" tall.
