I have two questions:

1) I have a 70#, 29" draw Reflex Caribou and I am wondering how far one may go in lowering draw weight. I realize that tuning problems may arise from greatly lowering draw weight below the bow's rated poundage, but how does one determine what is safe?

2) Most charts available for arrow selection no longer have wheels as an option, rather they have only hard or medium cams. Can I safely assume that I can err on the side of lighter spine weight when selecting arrows since wheels have a more gentle "loading" of the arrow?

Any help would be greatly appreciated! Thanks!