2 servos mounted to one platen

[James Fillmore 0]

I've done 100 single axis AB units now and always used the auto tune and then tweaked the parameters. I’ve been dealt a new application; lifting a 2000lb plate to multiple positions with 2 AB MPL430 servo mounted to 24" Exlar actuators. I can't autotune this since the 2 servos are MECHANICALLY coupled, one on each side. It looks to me like a bad mechanical design. I suggested like a scissor lift in the middle but this is what I have now and customer is on his way. IS this a bad servo application? Mechanically coupling 2 servos? Do you ever see applications like this? How the hell would I tune this? What parameters would I use for each motor if I just did the calculations by hand?