If you can't attach the file it is most likely not a supported file on this site, just add .PDF to the file ending.
Don't rename the file itself but place the .PDF after the .AI or whatever the file extension is. (File.AI.PDF)
We just have to remove the .PDF once we download it and all is good.
We would all like to see the file, especially me as I'm trying to learn how to make Tayda artwork for my boxes and the more examples I can find the better it is.
The only drawback for me is I will have to build the pedal for myself now.
Cheers
Mick