I have to get the file off my shop computer first, and then I'll upload it here. I do have it psoted on the Vectric forum.
If you decide to make a vertical clamping jig for your router, I suggest putting it on one end, to simplify loading/unloading. The vertical method is definitely the more efficient way!
One thing that would help: milling the "bevel" or "draft" with an 30 degree bit using the coventional method is slow, and there's a risk of breaking the bit tip. I'm looking into programming the paths in OneCNC using its open pocket toolpaths, where I approach the final shape from the outside in, and rest-machine the sharp corners. Or better yet, if I made a 3D model of the joint, I could rough out the part, including draft, with a straight bit, and finish off with the V bit. Of course, when I have the time...
Also, this maybe one job where HSS bits may actually be better, since thwy won't chip as easily as carbide, are sharper initially at least, and cheaper to replace when dull.