Is there guide for xr500 software on r7800 hardware?!?

I have been reading through a few different articles and forums that it is possible to use xr500 firmware with some tweaks on r7800 router. I guess my question is, if this is true, how do you modify the firmware to work on r7800. Is this a bad idea to do?!? Currently, I have always use Voxel firmware with no issues, but I am curious to try the xr500 if I can find proper updated guide on how to flash it properly to r7800. Thanks in advance. If you happen to read. Thank you Voxel for making such amazing firmware!!!