To find a leak, use a spray bottle with dish soap and water and spray at every connection when the system is inflated. Eventually, you should see bubbles appear where the leak is. Remove the lines, make a fresh cut with a razor blade so the cut is very straight, then push the lines back in. Are these the CRMs or ASAMs? I have the CRMs and although it is pretty difficult, I can get to the lines at the top of the bags. You can use one of those mirrors on a stick to see those hard to get to lines.