I am in the process of changing my fork oil ( first time ). No problems until I try to loosen the 6 MM allen head drain bolts from the bottom of the forks. I heard it was a tough job. I have a 6 mm allen wrench that I cut and made a long tool to get into that recessed area past the axle housing. Problem is the allen wrench seems to be slipping. It appears to be a "quality " allen wrench. What is the technique that you guys use? Should I try my air impact wrench or will that damage the bolt heads? I already bought two new allen bolts just for this reason so I am not that concerned about chewing them a little, just don't want to damage them so bad I can't loosen them. I was wondering is there a way to remove the fork oil other than draining it. Like maybe using a Mighty Vac to suck it out. I can use some expert advice, thanks.