450+ is 30% Vectran and 70% Dyneema. The Vectran is the cause for concern--I think there's been one or two 100% Vectran, or similar, materials put on the market that caused a lot of grief for the manufacturer.

I hadn't even thought to look at the TBB (I have all three)...but those have been out for several years, and a lot of materials have come out and/or been changed since then.

Using fewer strands so you get more stretch makes sense in a way, but on the other hand that's the reason I prefer HMPE materials to begin with. Seems pointless to me to modify an HMPE string so it will act like a dacron string.

The biggest problems I have with promoting skinny strings are, IMO, a lot of "information" purported about them that just isn't so (i.e., "I had to go up two spine groups because I got so much more speed")--at least not in my experience; and that makes people curious and they want me to make them. I will only go so low in strand count, due to the liability involved. Well, that and my concious--I'd feel awful if someone were to be injured because I made them a string I knew was not safe.

There's been too many challenges put out for folks to prove these things--like Ken Beck's offer of a free bow for proof of a gain of...2 fps, I think? 'Course there was a flip-side of forfieting your bow, or having to order a new BW at retail if you lost. I believe that challenge was out for a full year, with no takers. That says a lot to me.