I have a project in mind that will require 1/4" through mortises. A lot of them. I pretty much stink at making mortises by hand. In your experience, does a mortising machine make clean through mortises? Do you have to turn the piece over and finish the mortise from the other side to get clean through mortises? I want a little group wisdom and experience before I purchase a tool.

Also, your thoughts on what is a decent mortising machine are welcome. Money IS an object (and probably always will be in our household).