Old thread I know, but being that I'm on my 3rd motor for my electric stabilizer jacks in 2yrs...yes, convienient but if they go again, it's going to be manual's all the way.
(without looking I believe they're they're either Ultra-Fab or LCI style of stabilizers)
They aren't designed for lifting, just for stabilizing which, again from experience, are OK, but I still put a log and a sissor jack in the middle to get rid of the bounce. Oh and no, I don't attempt to lift with these. I just get them snug and then use the manual crank to get them a bit more snug if required...(based on the RV use training we did when we picked the unit up in 2011)
Another though might be this...30ft with only stabilization on the front and back WILL cause some bounce in the middle. I'm pretty sure everyone here agrees...I add just enough support in the middle to just snug the jacks up is enough to make the TT virtually bounce free)
Electric Tongue Jack on the other hand...it breaks...it WILL be replaced...
Just my penny...
Tim (aka workingchump)