Comments sought on new build: A CNC Router for RC Gliders and Planes

[njhussey]

Well I spoke a little too soon. I did press them all down firmly before pouring and still had a couple of leaks. As soon as the epoxy finds a leak path it lifts the draft excluder. Spent 1/2hr chasing 2 leaks...managed to stop them with some blue paper towel and masking tape. After 1/2hr the epoxy is slightly more viscous and stops running (famous last words) as much. Going to check in another 1/2hr to make sure no more is leaking out.

I used 1kg (mixed) for the rails and the gantry. I'd guess the rails are 4-5mm thick and the gantry 2-3mm. The large container (like an ice cream container) I used was ideal as the epoxy didn't get warm at all after mixing. I was quite vigorous in mixing and there were quite a few bubbles but the 7mm hole I drilled in the side of the container coupled with pouring it from about 12" high eliminated nearly all the bubbles. So if you're pouring it do it from a height so it pours in a really thin stream and it gets all the air out. Pics below.