Hi Rob- I've been reading your book and throughly enjoying it (even the reference to my Tii). I have long wanted to put a lift in my garage and reading your chapter on tools rekindled my interest. I'm curious what drove you to the scissors lift as opposed to a 2 or four post lift....especially given the limitations that you mention regarding the scissor and the amount of under chassis work you do. BendPak 4 Post HD-9ST (narrow profile) Danmar MaxJax 2-Post Portable Bendpak Mid-rise Scissor Lift Also, given you line of work, I was wondering if you can suggest how to determine slab thickness and whether rebar was put in place for an existing garage slab. The MaxJax requires a minimum of 4" thickness with rebar. Since I didn't build my house I have no way of knowing the concrete specifications. I have read up a bit on Ground Penetrating Radar, but I suspect this type of technology would be cost prohibitive for my purposes. Alot of people on GarageJournal.com report favorably on both the MaxJaxx and Bendpak lifts, with the 4 post favored for storage and the 2 post favored for servicing cars.