I have seen several post talking about Poplar not being a good wood for bow making. That sounded like a challenge! Here is my 72 inch poplar self bow. I did add a black walnut handle and riser to simplify the build process. 2.5 inches at the fades, 1 inch tips, 45 pounds at a 29 inch draw. It shoots really well and has taken about a 1 inch set over the last few months but seems to have stabilized.