I have one very similar to yours hanging on the wall with sinew curing , mines 62 1/2 ntn & hickory ,I put on about 800 grains of sinew in 2 layers a week apart I don't think it makes much difference if you put it on all at once or in separate layers I think it looks nicer if you sand in between I only reversed braced mine about 2 1/2 in it has picked up another 1/2 on cure so far, good luck with yours it's a beauty !