yes the lateral bends add another element of stress,, I think the sinew would help that,,,especially if wrapped in the bad areas,, at the risk of repeating myself,, I had a bow with bad twist, or snakey,, at full draw one of the snakes,,, started to pull apart at the grain,, with the lateral tension,, I wrapped it,, it was ok, then the other snake started to fail as well and the tiller shifted,,
so I sinew backed the snakey area and that part stiffend up adjusting the tiller,, and I wrapped it as well , the bow is still shooting a year later,, it was never gonna make it without the wraps and sinew,,d
I am not saying this bow will come apart,,but since I am old ,, more patient and conservative than I used to be,, the little extra work to put the sinew on,, would definitely increase the odds of success,, or at least linen wrap the areas with lateral stress,,
if you do that and it holds up you might wonder,, would it have made it with out that ,, while you are shooting it,,,
in my experience,, geting the taper even on the reflex and deflex, ,is the best option, no need to over think that,, its easy to make the reflex bend too much and then you have a weak spot like sleek said,,
if you want to make it no sinew or wrap,, then think about reducing draw and target weight, ,, I try not to give advice unless I have experience with a given situation,, if I dont,,, I usaually say I am just guessing or spit balling,,,
