In place works excellent.
I like this, if I had done this when I built the garage it would be wonderful. Now that the garage is all built I don't really want to try and install one of these. To do that would require busting out some of the concrete and pouring new concrete the size and shape to install one of those lifts. It would be really nice when done, but would require a lot of work and expense. If I were 20 years younger, that would be much more appealing to me. But I am 72 years old, will 73 in less than three months, and I don't really think it would pay for me to spend the money to do this. But I must say, thank you for the idea, if I were younger this idea would likely become a reality.