Nice looking bow and sweet bend. Would rather stay clear of highly poisonous material though.
Most wood dust is not so good for your health, therefore it is always advisable to wear a dust mask and ventilate.
Tropical hardwoods like handroanthus are very aggressive, yew dust can cause serious problems
for laburnum, i think the saps are worst, and after drying the effects are reduced.
Just be aware and take good measures, you can easily work with this beautiful stuff
have fun building