I've been using the same beam I hacked out of a 2x6 with a hatchet 43-44 seasons ago. Seeing how its got a 2x6 base, scabbed together from the left over board, its portable. Its been to countless trapping camps in E WA, into Idaho, and Nevada. Im stalling right now as Ill put 3 beavers across it this afternoon.
I use a straight fleshing knife hence the flat beam. Ive yet to try a curved knife or beam.