Frank,
I am shooting a Samick Phantom, 45# @ 28", and I draw a shade over 29". Easton 2018s, cut to 31", with 3 - 5" right wing/right helical feathers, and 125 gr. points. That bow shoots them well, but I think I could add a little more weight up front without adverse affects.
Orion,
Those are all good points. Since I cut my arrows to 31" with a 29" draw, I think I could shorten the arrow to offset most of the increased length, while still maintaining an overall length and distance to the point that would clear the shelf and that I would be comfortable with. You are right about breaks - broken is broken, either way.
I really wonder about stability and durability. None of the types I have seen have stated how far they are seated onto the shaft, and the pictures sure don't look like it can be more than 1/2" to 5/8", at most. With that little contact, will they withstand the rigors of frequent practice sessions? If I have to tighten or adjust them frequently, I would have gained nothing that could not be accomplished another way.