G71

Currently the remap version is a proof of concept, intended as an improvement on the ben potter G71 branch that you can also find in the git repository,

Currently G71 with pockets is indeed remap-only and suffers from that in that it lacks some important info that a fully integrated cycle would have. You should find that the other patch works better, but does not do pockets.

Because of a limitation in the current interpreter one of the roughing offsets is an integer, so has to be given in terms of thousandths of the current program units. (I have forgotten which, but might remember to look tomorrow. (I am grabbing a few minutes late at night on a work trip to the US to look at the forums))

So, yes, remap only, and not ready for release, but can make parts. Calling the profile as a sub should give an exact profile, despite any slight flaws in the code of either version, but cut depth may be erratic on that cut.

Which version (and how) is that?

I do hope that we will get G71 as an actual G-code at some point. I was hoping Ben was going to do it, but he seems to have found other things to do.
It's on my list. Along with multiple spindles, but I have a bunch of bugfixes that are higher priority, and only just got a working dev machine back.