My plane holder while i am working on them is a work table from craftsmen that screws in and out (gets wider and narrower) and is about 2ft. long. I drilled 2 holes on each end and set pvc T's in them. Then ran 1ft. pieces stright up and put another T 3/4" put 1/2" thru T's for planes to sit on and about 4" pieces of 3/4 up again to hold them. I can just move the wings up and let them set on the 4" pieces and the pipe in the rear will keep the plane from falling in the rear and then you can pretty much balance with no fear of the plane falling. You can screw the table in and out and the 1/2" just slide thru the 3/4 T's without having to hold the plane. Works great. I still was using a CG machine but won't bother with the hard to use little thing anymore lol.