I should be? It does eliminate those pesky air pockets. It would keep my hands cleaner.
I can tell you this. Don't add molten lube to a Star above the relief hole in the back then shove the piston back it. Great way to shoot lube all over the bench out that relief hole. Not an issue any more since I covered that hole and went to the air piston. Some of that lube is still around the back of the bench.