anyone tried Anderson levelers? new to TT, learning all I cn

I just picked some up last week and used them last weekend for the first time. They sure made leveling easy! It's a little tight between wheels so I may trim a little like the above post. First trim=success. I will still bring some 2x6 in case I need them. I've never been at a site that I needed more than 3 x 3/4" boards. 4" seems like more than enough max height.