I think those woods would work fine, if you're goal is 35#. You just have to taper farther down. Not sure if you want to go all the way to center of bow though, but if ya want to go from 70#'s down to 35 ish, you got a lot of wood to remove. I haven't made any ELB's, so maybe the ELB experts will chime in. Good luck and keep us posted. looking forward to seeing it finished.
Tattoo Dave