Yes, interlace pictures are good for test, but as i experinced faulty Nicks do not like the attribute mode, ex you can check it with new version of The Hobbit, but old speccy conversions produce also strange behaviour, ex the screen jumps a bit, and at the bottom of the border moving black lines appears, by the time the number is increasing in Exploding Fist, status line contains strange and changing characters in Turbo Esprit. My original ep has also faulty Nick, and i experinced thi behaviour in my childhood, but did not cause any problem for me I did not expeience the purple pixels, which cause more problem, which appears on attribute screen palette changed in each line. I bought another EP after 2000, and it has also faulty Nick, and i guess the Egyptian also what i bought in this year.

Thank you very much
I created full 4mb  RAM config with sf3 for testing purpose, only 128 KB was ROM, worked without problem , but memory test took quite long even with fast RAM test too, i think 512 kb RAM is enough nearly in all cases, as i remember 1 or 2 programs using the advantages of more RAM, but with SD card interface it does not matter, because both of them loads the whole program into memory if there is enough free memory.
Smaller portions of ranges can limit only 2 programs if i remember well.
The most important in all approach to include F8-FB segments nto the expansion, by this solution all non EXOS compatible programs will work too.

I would be interest for one in case if remains, i do not want to stole the opportunity from others who really need the expansion.

Other aspect was that a lot of programs failed to load, but I think that it was due to lack of Ram space. Kyp says he will add more on the next update.

Yes, most programs are not running on EP64, old Speccy ports because they are using fix segments (F8-FB) except Zozo's conversions, most of newer ones need more memory.
Almost all programs which runs on EP64 lister here except those which run, but slowly.

Do you have picture from the 3d printed joy?

I think your machine was not so expensive if you could buy it under 150€ , the truth is that 20 years ago it was much cheaper.

Impressive progress, did i see well an attribute mode picture was started to load also?

as i remember, i use winimage:
www.winimage.com/download.htm