Thread: How do i do this !

Firstly welcome to the forum. I am really not sure how you would do this but if I was to guess I would use a file and sandpaper.

Maybe others on the forum have done this before.

There are a couple of ways you can do it, but here's how I'd go about it.
Cut the quad mouldings for the top & bottom to length, with a 45 deg. mitre on each end. I do the mitres by cutting a little oversize, then trimming to length on the disc sander. That way you can sneak up on the correct length. Then cut the vertical quad mouldings exactly to length, but with square ends.
After you've assembled the boxes, glue the mouldings and hold them in place with masking tape. After it's all dry, round over the mitred corners using a file and sandpaper. If the mouldings aren't perfectly flush with the sides, you can clean them up with a plane set very fine.
You could use square section instead of quad, and plane it to round if you wished. That gives you more timber options.

Thank you for the reply,

so a 45degree mitre cut is all that is needed ? i must be doing something wrong some where as i have tried that it will not join together ....i assumed it would be a 135degree cut or something that isnt on my mitre box

i will try again tonight and hopefully will get it right,

thank you for the tips so far

45 deg one way is 135 deg the other.

I'd probably do it the way Alex described, but another way would be to cut the bottom and tops square and to length so they finish flush with the inner face of the rebate, then cut the sides oversize, to be shaped by coping saw/rasp/sandpaper after glue up.