Rounding the bottom might be the answer if that doesn't work you might want to move the joint farther up. Making a longer tail section and shorter front. If you get that wide part to be the start of the joint it can catch more of the water. Not sure if that will make sense or not
Edit- could also try a bill that has an angle of a diving bait and see what happens. The flat bottom might keep it on top still.
where did you get that? i havent seen them on any sites yet, looking to try one or 2 myself. How much are they i havent been able to find them for sale.
you can add food coloring paste to epoxy to get alot of different colors, i have tried to make a "mold" out of clay so i can get different shapes and it kind of worked but you have to mess up the clay to get it out then wash the clay off
if you can find pvc that is a size that will work you might want to start with that because you don't need to seal it before testing- the the weighting will probably be trial and error so it would be better if you don't need to seal each time you change it. otherwise i would just use some scrap wood
Could work- normally they seem to work better if the picture is completely straight to start with. might be able to turn it a little but shouldn;t be a big problem