Aquarius said:
Here Brothers
https://web.archive.org/web/20210523173035/https://evilgoy.com/RTRS/A/index.html
Thanks for the link Aquarius but as reported unfortunately this version on webarchive stops working after six reverse letters:
https://www.ancient-forums.com/viewtopic.php?p=445498#p445498
If it works for anyone please report it.
In the meantime I am using the paintable version with a tap count on the smartphone to make multiple Final RTRs; maybe it can be useful to you.