Originally posted by macbow: Aluminum arrow numbers in the case the first two numbers, 20 mean 20/64" outside diameter.The the 16 and 18 is the thickness of the wall in thousands ..016. And .018.So since the outside is staying the same the inside has to change since the thickness changed. The 16 will be .002 looser, so .001 on each side of your carbon.So it could work with a thick glue.As for where I used to put them just,up to the glue in, insert.
Originally posted by vintage archer: Mr Fingers in your quest for footings check out TuffHead broad heads web site. We we offer footing kits for most carbon arrows.Kit # 1 will fit you arrowHere is a direct link to the e kit. http://vintagearcheryco.com/shop/index.php?main_page=product_info&cPath=2&products_id=26