I hear so many horror stories about the surgery that I keep putting it off. Of course, everybody told me horror stories about getting married 45 yrs. ago, but I did that anyway. Im gonna have to get it done, its both sides and its even tough sleeping.
Anyway, back to this power lift. I love it, I'd buy it again. But I personally would have done one minor modification if I were to have the installation to do over again. In fact, I might take it apart someday and do it regardless of it working fine.
There is a two piece hub with an allen set screw on each one. One half goes on the dc motor shaft, which has a flat on its shaft and the other one goes on the lead screw after removing the nut. If I had to do it over again before I put that Hub over the threaded lead screw shaft, I would drill and tap the Hub for one more Allen set screw and double up on them. The hubs are connected to each other with a rubber spider that helps ease shock and prevent the two hubs from wearing against each other. It seems a big task for that one little set screw to hold rotation against that lead screw thread for the Z axis. Time will tell I suppose, and either way, adding one more or even two set screws, 120 degrees apart is no big deal. I am very happy a pre-made solution to cranking that damned Z axis was available. Thanks Greg!