Dave, you can reduce the thickness with a farriers rasp or anyother rasp that has a heavy cutting side, draw the lines for the thickness on both sides of both limbs then remove wood down to that line on both sides but leave a ridge in the middle like a roofline. Once you get the edges reduce to the line start removing the center ridge untill the belly is flat. I used carpenters yellow glue tightbond and if i were you i would cut it down to 68" overall length and 66" nock to nock