I'm tackling a project where I need to cut a 3" to 4" deep castle joint into the ends of four 4x6x8 posts for a portable garden trellis. I'm leaning towards using a router jig for this task, since I want to avoid using hand saws and chisels. I'm concerned that my oscillating tool won't give me the precision I need. Since the construction won't utilize any fasteners and will feature 2x6s spanning the top, I want to ensure I do this right. Any insights from those who've tackled similar cuts would be appreciated!
3 Answers
Using a handsaw and chisels is actually one of the simplest ways to tackle this. It can be surprisingly quick and effective—you might find it easier than trying to set up a router. Why not consider giving it a shot?
Yeah, I get the router appeal, but it just seems like a lot more work for something that can be done easily by hand.
If you go with the handsaw and chisel route, you'll save money and time on router bits. Plus, since you're cutting 4 inches deep, you'd need some pretty long bits for the router. Just a thought!
I totally get the router vibe, but I’ve seen people get amazing results with handsaws and chisels for this kind of joint. It might be worth trying!

I was thinking the same thing! A handsaw and chisel might end up being less hassle than a router setup. It’s not as complicated as it sounds.