G71

What would be my simplest option to obtain G71 cycle?

I hear that ver2.9 has it built in. Is this my best route?

Would it be as simple as:

Make a back up copy of my config folder with the .HAL and .INI files

Install/replace my ver 2.7 with 2.9

Then copy over the backup folder?

Will it have any effect on my current Lathe set up, will everything stay as they were?

Cool. I give it a try.

Andy,
I have successfully trialled G71 via version 2.9, and as you know am currently working with the new 'missing-teeth' feature with 'one' sensor in an attempt to get a working G76 cycle.
BUT, the latest upgrade of 2.9 has made my system completely unusable because of GUI screen re-sizing issues when using GMOCCAPY or other Gscreen GUI's.
I'm currently preparing a new hard drive to step back a version back down to 2.8 so that I can at least use the Lathe.
Once installed and working, is it at all possible to gain access to the G71 & 'missing-teeth' that we see in the 2.9 version, without installing the problematic GUI that comes with that upgrade?

I'm going to have a go at this, starting with G71 patch.
I have a fresh new install of 2.8 on a clean new hard drive.
We have run updates to the latest version of 2.8.2

I'm completely new to any of this, so please bare with me while I educate myself.

My first question is regarding:
github.com/LinuxCNC/linuxcnc/commit/c73b...ba16915bb200fbe5d109
Is this just a location describing the patch,

and the actual patch is located:
github.com/LinuxCNC/linuxcnc/commit/c73b...5bb200fbe5d109.patch

In order to use: patch -p1 < name-of-patch-file

How do I obtain the 'name-of-patch-file' file?
Do I cut and past the script into Geany and save it under any file name with .patch extension, or is there actually a file to download or link to ?