[mms3]

I've started working on some N3 enclosures, and I'm not sure how to approach the half circle cuts for brace B.  My thought was to clamp two of them end to end, and just treat it like a full circle cut.  I'm probably making this more complicated than it is....

[jdbrian]

Hi

  I just went through this when building my OB7 enclosures. Just cutout braces with 3 holes in them and cut them in half. If you need a single half hole brace just cutout a 1 holer and cut in half.
Much easier than trying to cut out a halh a hole.

Brian

[soewhatman]

I just marked a line and used a jig-saw.  I sanded the curve a bit on a spindle sander, but that would not be necessary.  Since they are inside the box I didn't think it mattered if the curve was 100% true, just that it was mostly right and there was room for air to move around.  Cutting my half circles was very fast and easy this way.

Rick.

[Danny Richie]

I just come in about 1/4" from the edge and drill a pilot hole for the center pin used in the circle jig and cut out the half circle just as I would a full circle.

[mms3]

Thanks for the tips.  I wasn't sure how precise it needed to be.