I’ve been a Ingersoll Rand user for over 25 yrs professionally I have multiple 1/2 impacts, 3/8 impacts 3/8 air rachets, grinders etc, but I have never came across the problem with the last two 1/2” 35 max I’ve purchased here, first one used for a week then oil and air started leaking through the case half’s? 4 bolts were tight and the gasket looked straight, sent that one back, received a replacement used for 2 days and now the second 35max hammers start skipping it sounds like and the hammers slow down with no power? Shop air pressure consistent , What’s going on Ingersoll ? Are these units rebuilds? Selling as new? I am going to try one more before giving up on this gun.