I want to get a manual underpinner. I am only building frames for myself as I am an Artist, so maybe 150 frames a year or so. Been using the clamp method for quite a while, as I used to carve and gold leaf after joining. Now I want to cut the time and effort and join prefinished. I am considering the Fletcher 5500 or the ITW VN machine. I cut slightly wider mouldings average 3"to 3 1/2" or so. The Fletcher has me concerned that it goes to 3 9/16". I have heard the double clamp is good on those which the ITW does not seem to have. Looking for recommendations. Thanks.