If one were going to use a running guide as a tip top, I assume you would place the rod tip even with the end of the guide foot. Once the wraps get to the end of the rod tip, do you add a few more turns up the guide frame past the tip? Do you fill in this void with epoxy to make a neat transition look? Thanks.

I do this a lot. It cuts down on the weight at the tip, especially on light spinning rods. I leave enought tip so that I can do a Forhan locking wrap. If too much tip remains exposed you can sand it off. I usually use persall's gossamer silk and it looks like the tip is painted on.

Exactly. Jim beat me to the post. I do this fairly often, too. Forhan Locking Wrap and all. Fly rods, too. Ralph

If at first you don't succeed, go fishing, then try, try again.