Air Bag leakage

[Roger-Ohio]

Am looking at air bag suspension. Had a friend that worked with designing air bag suspension on late model cars & trucks and he said that many times there was air loss / leak-down with some setups so he said I would need the on-board compressor & tank setup.

Anyone have real life experience with bags? If you have leaks or not which bags r u using?
I am looking at the Firestoen Convoluted bage not Shockwaves.