Also, I do have a lot of luck with crowned or trapped bows, but in my own experience, simply due to the reduction of width toward the tips, the bow becomes less "trapped" by default. I believe a lighter overall limb is beneficial, but I also believe that the most benefit is derived from reducing the tip weight, say the outer 1/3 of the limb length.
I could be wrong. But Baker's design in the TBB's where he uses flax fiber to prevent lateral flex on a bow with a very narrow outer limb half still has me thinking a lot.
One thing I would like to try is making a backed bow with a belly slat that originates as two narrower slats which warp symmetrically away from each other just a bit. During glue-up, the two halves could be drawn together at the tip of each limb, creating an effect similar to Perry reflex, but laterally, and then the backing applied in side profile. I expect that would create a very stable outer limb, regardless of design. Possibly most beneficial in a R/D with skinny tips.
And I want to see what you do with that bamboo, next.