I’m tracking that you are manually lowering the z. I was thinking you needed to raise the z so that you would create a flat top on the plug for glue space. But the part that I’m confused about is getting the v bit to cut the opposite side of the line and create a peak to fit into the valley. By just pocketing the other side of the line you’re not creating the matching side. I feel like you need to explain the offset and geometry selection a bit more. I’m thinking the start depth on the main piece needs to be set to .1 and the max depth set to .2… and the plug start depth set to -.1 and a max depth of .1 would be easier than messing with manual z adjustments.