Ha. No, I don't actually. I have a Milwaukee cordless impact driver I keep on the shelf next to the mill with the proper socket on it. I would not have considered this but noticed some of the power draw bar builds use a butterfly style impact gun, I thought why not try what I already have. Seems to work well and it's plenty quick compared to using a wrench. Orange Depot had a sale last year that include a drill, the impact driver and three LiPo batteries for something like $200. I have a hard time passing up a good deal and they have proven to be quite good thus far.
Mike