@splintergroup are you suggesting this as a way of reducing the importance of the hole being initially straight to the board?

It’s a clever idea, but not sure why I’d bother with that as opposed to just trying to get it right the first go around. The other thing- this first speargun is gonna be for me, but provided my design works well in practice- I’d be open to selling them as a side project. From a buyer’s perspective, seeing that the laminates do not run perfectly straight to the gun, i feel like that would look incredibly sloppy? And there are other geometries in the gun that would really highlight that error in the end product.

I like your thinking, I have with all the solutions you’ve suggested haha, its just always half a beat off where I’m hoping to be haha. Who knows, it’s still a super useful backup measure to keep in mind.

With that said… all the lathe stuff had been in the comments of my drill press table post. I’m hoping you can offer your thoughts a bit more in regards to the thickness milling question I raised in this specific entry?