Rick: look over at Anvilfire.com. In the Guru's Den forum, someone is offering a model L with installation istructions currently owned by a high school. Possibly you could get a copy of those instructions.
At the shop where I have been helping out, we have a 25# Little Giant sitting idle because we are wary of crqacking the slab, and cant cut through it to build a pad. We are in a historic, town-owned building, and are very careful guests. Is there some mount we can use that has a reasonable expectation of working on a conventional 4" garage floor type slab?