I've had my new HTS for about a week. Yesterday I decided to stop reading and shoot it. First flatband I've shot. I'm 72. I shot 20 rounds at a 6 in paper plate taped to a catch box stuffed with a sleeping bag at around 20 feet. I'm too embarrassed to post results. The only other slingshot I have ( and have not shot for several years )is a Marksman , I think it's referred to as a Starship. I have arthritis and don't relish tying flats.I plan on shooting 75+ rounds per week and would like to try tubulars, 2040 shooting 5/16 or 3/8 steel.What do I need to buy,preferably from Bill Hays, for this set up ?