Are the WDH and Levelers the same on all Hi-lo's?

No Sir! To be sure there are several different companies out there, and for the most part, their products produce the desired result. However, there are a couple of different installation techniques. Some require drilling a few holes through the "A" frame of the trailer on both sides and others only require a single "set" pin tightened to the frame on each side. If you have the time, check out the different ones through "Google". Try e trailer, they have some good videos. Others have sway control built in, others bolt on. :D
Tree

Wdh
 

I was wondering if the levelers from my 17T would work on the 22T?
I found one in Hanover, PA and am going right past there on my way to Mercer, PA and am going to stop by to see the unit. Hopefully, the dealer has all of the hookup equipment for the unit. Will check and see.

Thanks

Mike