Found a decent used Rotary SP09 back in April and thought it would be an easy install on my 3 year old cement pad. Had the proper thickness and 3,000 PSI reinforced concrete, but I had some small cracks in the floor and a 1" void underneath the pad in some places. I had a Rotary installation company consult on the install and they could have made my lift work, but recommended I just cut out two 4x4 holes and repour. So that's what I did. Had a friend in the cement business and borrowed a concrete saw and rented a jackhammer. Took two days to get the holes cut, cleaned and pinned with rebar. My buddy came in on day 3 and poured the new pads with 5,000 psi concrete....9 inches thick.
I was going to do the install myself, but never having owned one or used one before I thought it would be smart to have it installed professionally. Glad I did...guys were great and found some pieces that were missing or needed replaced. Went up in about 2 hours.
No more working on the floor on a creeper for me.