I used the plans that Rudi has on his web site. It is in the RV-7, tips and trick section. Minor differences in height and width are pretty much a personal preference. I'm 6' tall so I wanted a slightly taller bench. 4' is just too wide, I went with 3'. The best part of Rudi's design is the storage. It is nice to have things right at my finger tips. If I need a lower height as I progress through the fuselage I will use the crate from the tail kit. I am adding some internal ribs made out of left over wood from the wing crate. It makes a passable torsion box, and it's free! I can vary the height in 8" increments using concrete blocks.