Ugh, I must be nuts, I already have a 2246A and a 358A miter box, (and a Marsh picture frame box) but they don't have the olde worlde charm of the earlier non "A" models with their fancy stock stop and heavier stock clamps and cast iron degree (or actually # of sides) scale at the front soooo just bought an older 2246 with all the bits intact off EB, shipping made it about $90 (no saw included) which is a lot for a miter box without saw, but the older all cast iron ones don't seem to come up as often as the reduced cost of manufacture "A" models. Oh what the heck.............
Anyway, enough of the buyers remorse.....
Regarding miter saws, I have four, all are hollow in the center as you might expect for a saw that only sees wood in the middle! How does one go about jointing this out? If it were a long piece of wood we would use a #7 or #8 plane, but saw jointers can only manage the length of the file which is going to be 10 or 12" tops. Not enough to span the 28" blade and take out the ends. Is it a matter of selectively jointing and reshaping the ends only for a few passes then moving on to the whole saw once the hollow is taken out or????