Your review: Acquiring tool and accessories for a home improvement project within tight spaces. Reading CAGI literature and anything else I can find. This is listed as an oil free tool but shows a typical inline oil setup that I was not expecting on the "owners manual". I am interested in what maintenance steps are required for this tool. When changing bits, how tough are they going to be to swap out? I expect this to be a good investment. The supporting literature is a little lacking for a cautious novice.