We tried the 3-level ramps and are now looking to sell them. I felt they were leaving my TT with a desire to roll back down them, creating a side-to-side force at the tongue. Made for a very exciting unhooking once last summer.
So I'm back to the yellow plastic lego blocks (CW's version, not as nice as Linx). The thing that really sped up the process for us was permanently mounting a level indicator on the front of the TT. That way when we first position ourselves on a site we can tell which side needs to come up, and more importantly -- roughly how much.
Then the part that works best for us is to have the spotter out there with a walkie talkie add the blocks, guide you up, and then verify the job. The biggest challenge at that point is if my DW is the spotter, a bubble-level is still very hard for her to read/interpret.
