I wrapped my handle in a paracord wrap because it cut me, can you tell me what the diameter of the slingshot tubing is? I am trying to find a replacement but don't want to buy the wrong diameter. I got a hole in mine after only a few weeks, not sure how I managed that, I know they have replacements on the web site but shipping to canada is too costly, and am hoping to find replacement off amazon or locally, hard to tell on line what the proper diameter is,