Over the past 3 weeks I have completely gutted the existing motion control platform and rebuilt it using convoluted bellows. One structural change was made with the platform itself in the front right corner to provide bolt holes for the front right bellow.
The bellows are capable of lifting 4000 pounds EACH. The question is how quickly I can inflate and deflate them. I have my eye on the Numatics E22 but none of the ones on eBay currently support the analog input variant. I will be conducting tests on the rear right bellow using a ControlAir 500X.
Only other thing we are waiting for is 3 inch aluminum extrusions to make a base frame for the platform to rest on when not in operation (otherwise we would compress the bellows beyond their design limit of 2.8 inches).