Craig, looks good, should work nicely. If you have a vacuum pump and a jar, its helpful to degas the resin before you pour it. Gets rid of the bubbles in the resin. The white doping helps cover them up, but still can cause issues. Some people pour on a stick to keep from getting more bubbles too.
I'd probably put a notch in it on the outside, top, for pouring the resin. Could stick a funnel in there of some kind to make pouring easier depending on how viscous the resin is. Also need the air to escape somewhere, another small hole on top, somewhere at the other end of the void is good. We also move the mold back in forth after pouring to try to work out the bubbles.
Bubbles really suck, we used to have them be a problem all the time. I'm worried about your mold trapping air, might take a few tries. I think the epoxies are more forgiving with bubbles I guess.
Good luck with it!
Last edited by Paul Bell; Mon Mar 15 2021 03:28 PM.