The whole point of making a longbow or longer bow is that its safer and doesn't come as close to exceeding the woods limits...in general and when all is equal a longer bow is faster and a very efficient weapon if done right...efficient enough for the majority of most archers....so why add sinew to something that's already a good thing? Sure ya can,but why? A shorter sinewed bow needs added setback,reflex,or recurve to be able to shoot on par with a good longbow,and to overcome the shorter bow is slower rule...you would have to pull a sinewed alb into near or more than 10" to get he benefits of sinew IMO...and when ya do that to an already long and narrower design your gonna possibly run into some stability problems,and a finicky tricky mess to tiller and tame,not too mention much the extra time involved sinewing it,and ya might have to make it wider than a self bow to compensate for stability issues adding even more mass cancelling out some or most of the benefits...the whole point in archery other than flight shooting is HITTIN YOUR MARK,and not speed speed speed,fps fps fps performance etc...and I see a lot of folks get blinded by that and thinks that is what makes a great bow,and forget all the other ingredients of a bow.....well I disagree....you can get the same results without sinew on it,so why? Just don't make sense to my lil pea brain...