I get 99% of shaft maple from flat sawn boards, the rest I mill myself & cut it my own way, specifically for shafts. It's tricky choosing the good flat sawn boards & takes practice, but is not impossible. I get a high yeild of great shafts by choosing my boards. On a very good pallet of maple, which is 1000bf, i'll get 100bf. That's roughly one of every ten boards, or 10% of the boards are suitable for shafts. Of these ten boards, only the best areas of the board will yield suitable shafts & the rest is junk. About 30% of each board chosen for shafts is not useable. Then once the shaft squares are cut & dowelled, another 25-30% is tossed. Anybody who thinks good shafts cost too much should do the work themselves one time. It's no pic-nic at the park.