Thanks, that doesn't sound too bad.

I'm not sure.

I think using the M110 command might be the easiest.

Are there any plans to add a feature that does this? I have a Delta Wasp Turbo 2 that has this which is sweet (could be faster imo) but I also want to build a print that has features that isn't on this printer (auto leveling, filament jam detection, and etc).

https://www.3dwasp.com/en/wasp-free-zed-system/
The Free Zed System is basically a recovery system for a printing that for some reasons, has been interrupted and it was not possible to use “ Resurrection“ to recover it. Or, after the Resurrection, we notice that the item is not well done and we decide to re print starting from a clear point. In short it allows to print a file starting from a precise height of the model to be printed – height previously selected.

PS

I did find this to manually do it:
https://www.3dhubs.com/talk/t/how-to-rescue-a-print-that-stopped-mid-way/2392

Example:
The height measured was 44.2mm, in this case I am using a layer height of .32mm with a first layer height of also .32mm.

Subtract the first layer height from the total height, then divide the answer by your normal layer height
(44.2 - 0.32)/0.32=137.125

Of course, this value needs to be a whole number, and is a result of the tolerance of our measurement. this is why we did this calculation!

round the answer down to the nearest number
in this case 137. (This is (+1) is the number of layers)

multiply that by the layer height, add the first layer height
(137*0.32)+0.32=44.16. This is the height achieved, as far as the Gcode is concerned.

Remove the code from here up to start Gcode (all the descriptive code).