Hello, My slingbow based on Joerg's 120lbs concepts is consistently shooting too high. This isn't user error as shots with other bows do not shoot high. I'm thinking it's to do with the rubber string. It's been taking a few experiments and trial and error to really create a bow string which isn't too loose, powerful and easy to pull back with fingers as opposed to a release. I'm wondering if the rubber black theraband needs to be exactly equal on both sides of the nocking point to be accurate. Did anyone have any problems or experience getting the rubber bow string tuned in? Joerg's video seemed to have a perfect bow string so I'm wondering if it took a bit of time to make a really good string. I'm not sure if I can get this bow as accurate as my other recurve bows. Thanks Nick.