It looks pretty good. The key to not having the handle pop off is the thickness of the wood you made the bow out of. If the board you started with is too thin it will bend and can pop the handle off. Yours looks pretty good so as long as you have a good glue joint you should be OK. So back to tillering. Stay away from the 6" next to the handle until you get it bending some just to see how the fade area is working.