I modified the  frame jig plans from Beesource.com to assemble two deeps or
three meds.or smalls at one time.The jig holds the sides more or less square
while I slap on some glue and then staple the ends.Flip over and repeat.I use
rabbeted joints to reduce end grain exsposure.After assembly,remove from
jig,square with framing square(or 2 cleats nailed at 90 deg on work bench) and tack a
temporary diagonal until glue sets. free sources of wood  are specialty
machine shops.Many shipping crates are 1 x 12 # 2 pine and are free for the asking.

       Jack


                  http://www.beesource.com/plans/framejig.htm

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