Note of Thanks to ceetdm - Transponder Programming
 

Like others before me I was disappointed to find that my AK90 key programmer and software, whilst able to read the BINary file from the EWS EEPROM, was unable to actually write a new R75/MGZT key.

I reached out on the forum for assistance (https://www.the75andztclub.co.uk/for...d.php?t=327644) and member ceetdm* responded saying he had EWS Editor Lite programmer and software. Although I'm in Sydney, Australia and he's in Bonnyrigg, Scotland I was able to email him my BINary file thus allowing him to write a new transponder chip for me. It arrived this morning and works fine so I now have a spare key.

So, a big THANK YOU to ceetdm and a thumbs up to the worth of the forum.

*forum name used as a courtesy, pm if wanting to establish contact.