I'm currently getting my set of QPs ready for JB's Dual line clinic. I was looking at the setup for each and realized the only kite I'm using the stock weight set on is the VV. The stock weight set is super heavy. It does afford a wide range of positions, but frankly I feel the set was designed early on in the pitch oriented kite craze, and just isn't practical for anything other than the beast that is the VV. So my mod for my other QPs is to use barrel weights. Much lighter, while providing enough weight where its needed, with no excess threaded rod, etc. I keep the barrel weight in place with some tape I keep in my tool kit because I mostly fly inland and don't need to worry about sand. For the Ocean Shores clinic, I'll put some really small zip ties around the spine. I'll also be careful to dremel off any sharp edges in the ties, created by cutting the tag end,
One more thing, I usually put a quarter in the velcro right at the end cap of the spine. Having it right at the end of the spine increases the effect of the weight, making less overall weight needed. A buddy showed me this back when the E2 was new. He found a quarter in the velcro made learning the backspin easier.