I just picked up this cougar for 25 bucks. Anyone know what the recommended brace height for these bows is? It’s 62” and marked 45@28, but I’m drawing about 31. Also it seems like the shelf if very very flat. Would it be beneficial to move to an elevated rest (fishing line, feather, bear weather, etc)? I shot it maybe a dozen times an it is very consistent but shoots knock low. Has a 14 strand b55 bowstring and i only tried my usual hunting arrows, a 2117 with a 150 up front. Thanks y’all.