OK, Heres my take on the whole thing and maybe this will help. i have air assist on my 2 1/2 ton and it will continue to have air assist on it when these kits are introduced. i spare no expense when it comes to restoring my MV's, check my post M52A2 for some pics, and i really love new toys for them. but to be honest i don't think i would jump on these untill the air assist are gone.
the hydraulic kit is designed to pick up where the air assist is going to leave off, if it leaves off or ever drys up. for collectors it might be reasonable for some it also might be unreasonable for others. as far as a industrial use i think its going to be big $ for the creators. all the industrail uses would be the same that us air. examples are fire departments, loggers, mining,and utility companys.
lastly and keep this in mind, not knocking the hydraulic system at all, but if aberdeen was testing these how come none of the A2 dueces have them now? and let me tell you i have looked at the unit first hand, maybe some unforseen issues? to be honest as a fellow collector, and a mostly private one at that, i would always lend a helping hand to a fellow collector weather its pics or info but continue eating your popcorn and bellys holding the wheel, as mine does too. sorry no pics.