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Thanks, will give it a try.

I loaded up a good LGT board with the LGTISP.ino sketch ok. However, when I go to program the bootloader to another LGT board connected with SWC,SWD etc it gives...

You linked the github site, it only shows these files, no examples. Please be specific.  You show me an Arduino as ESP, in...

Right, you did not link that initially, now I understand. BUt the question remains, If I use LGT as ESP are the pin connections the same?

I don't have those examples .... maybe I have the wrong LGT library? I got the library from here: https://raw.githubusercontent.com/dbuezas/lgt8fx/master/package_lgt8fx_index.json

> LGT as ISP has these connections.  If that does not work, I will dig up my LGT's and hook them up. Has been a few years since I...

I have added the core I am using above, is it incorrect?

> That's the one I use. So why no examples?

THanks, these are the examples I have:  So just put the above code on the LGT board that has to act as ISP,...

Thanks will wait. Meantime I tried connecting the programming pins at the end of the board to the target board pins, but that did not work either. So Still unsure...