With professional band, the slingshot can shoot very fast. What I focus more is the accuracy. I got a stick style steel balls catcher so that I can know where the steel more hit exactly.
When I shoot the arrow with slingshot, I use this small gadget got from Dankung.com. That really helps the accuracy very much. 
Just pondering on Sheshou bands after getting from you the Stardi 0.8 which is an Anti Cold band and despite that works well in the hot tropics. It is durable even after a few nicks and it didn’t tear easily. Thank Dankung
I'am very glad of my slingshot. It's a beautiful? collector's item and it is very accurate. Yank you for your couresy mail.
Best regards,
THUBERT Norbert.
Great for plinking, and seems to be lasting too.