Keefer: Hmmmm. If I ever do it again, I'll pay more attention to the air pressure I use. For the most part, the tub is filled with shafts and oil though. Very little space for air. Also using very heavy gauge two inch pipe.
Jon: I haven't noticed my shafts losing weight over time. I make sure they're completely dry before I weigh and start using them though. Most of the weight loss occurs during this time, I suspect.
Joe: I've found the oil only shafts to pull out of targets a little easier, particularly excelsior and those kinds of materials. Much less likely for that stuff or foam to stick to the shafts as well. Likewise, the finish doesn't seem to burn like my lacquered shafts do.