And thanks everyone! Looking forward to all the problems that will inevitably show up, that you guys can surely help me through!
I'm glad I started in this end of the boat, next time I'll use some more rigid molds or/and tape the really firmly to the walls. This time I made them out of polyurethane covered in duct tape. It worked fairly well, but if the mold moved even s bit during curing and layup, it all results in small irregularities in the final shape.
It doesn't really matter here, these things are purely functional. But it would've been great to get them looking a bit more...professional?