Hi Caswell!
I think we are both dialed-in to the same thought process! I neglected to mention in my post that I actually did order a flex shaft too! I figured it might be easier to deal with in the tight places as the body and air hose of the die grinder are difficult to work and manuever with. So, I was thinking that I could grip my variable speed air drill in my bench vise and chuck the flex shaft into it in hopes that this will make the tight work with the felt bob less cumbersome...