Here's one of those channels that makes you thankful YouTube exists. The anonymous craftsman behind Easy HomeMade Projects shows you how to DIY all manner of unlikely objects, the most impressive of which are in the small power tool space. Wanna see something crazy? Check out his small-scale DIY miter saw:
Or this jigsaw:
And a drill made from a toy gun:
He's got dozens of videos up, going back a couple of years. Check 'em out here.