Sam, that PSE isnt as reflexed as its slinky lines suggest.
but here is the crux of the problem.
when a bow comes to closure, there is a BIG spike in the stresses in a bow.
the spike if mostly inline with the string. ie vertically, pulling the limbs together especially the limb pockets.
so if you imagine a line of compression directly between the two limb pockets.
an inline riser, can handle this, as the throat of the grip is where the loadings are centred. So this makes a column load. and all is good.
With a deflexed riser, these energies are outside the throat of the grip.
meaning that the riser has a hell of a stress running through it.
lets take a look at a horse shoe.
if you squeeze the two open ends together then distance will get less as the shoe bends.
there is nothing to support the shape of the shoe, so its going to bend.
If you put a vertical bar in there joing the two open ends, then you will have caught the two open ends, and the stresses into a column loading, so suddenly the shoe is ALOT stronger. infact, you can now cut the rest of the horse shoe away and the two ends still wont join.
We need to put alot of composit in the risers to resist bending.
We also need to do this to accomodate the 5/16" past centre.
now, there is a problem with composits and Timbers.
Timbers can shrink, while the composits wont. Sometimes you get a little step between the two, all wood risers, means that the riser all shrinks together. but you cant get the strength needed in an all wood riser.
So there is a double edge sward to run. we have chosen to run with what we think makes the better bow, while others might choose the better looking bow.
We chose this path when we went all carbon laminates, since you cant get clear carbon, so we cant do clear over vaneer on our limbs, that layup needs glass fiber.