I’m about to embark on large “half lap joints” style of joinery for a series of bookcases in Zebrano and Walnut (and Copper), and am using a Leitz 400mm blade. I think the best way to do this is to make 125mm deep cuts while the material is on edge. I am open to making the cuts with the material flat on the slider, stopping the cut, backing out, and then cleaning up the joints by hand. However, I have something like 280 trenches to do, so that’s a minimum of 560 cuts (one per shoulder) and more hand work to square the bottom of the trenches. I’ve made these kinds of joints before with a router and jig and I can tell you that programming the Kappa 400 rip fence with presets is wickedly faster and far more accurate.

Of course I’d love feedback for those who can see a better way. Appreciated in advance ?

The other reason for my post is to share my little “90 degree support jig” which is held in place using one of Mac’s clamps. This setup provides excellent registration for the material which is 2200mm x 250mm x 30mm in size.

Note the high-tech blue tape to dial in the jig for square. Woo hoo.?

Warm regards, Lucky