This thread reminds me of when I installed an alarm system in my house.
In the beginning, I designed a system that had each window and door, along with inside motion and outside motion detection sensors. The alarm guy said it was over kill. The alarm guy was a good communicator (or I was a good listener), because I eventually deleated some of the stuff from the system, and still ended up with a good system. The alarm guy eventually told me that regardless of what components are in the system, and how complex the system is, the homeowner has to feel safe when the system is on, and they are away from their home. He said the system is only as good as you feel it will be for you when it is on.
You ask "what the hell does an alarm system" have to do with car lifts?
Well, its easy. Both 2 post and 4 post lifts have advantages and disadvantages. Once you have analyzed the pros and cons, it all settles down to what YOU as an individual feels comfortable about using. Ease of use, safety, cost, size, ect., all will come into play when you make your decision.
But the important part is........when you are working on a car, or when you have one car up and one below, and you are out away from your shop, the lift that you have decided on will be the one that best suites your needs, and provides that safe feeling a person needs in order to be content on knowing you selected the right lift for your needs.
Sooooooooo, doing homework is important. But having that safe feeling is pudding on the pie.rockonsmile