Need help with The Phantom Apparatus

I think I've seen all the areas of the level, but I can't seem to find the final(?) code... I've even tried looking for it in the editor, without success. Help?

I'm playing the easy/normal version, with three symbols to open the final(?) door.

ETA: Oh, wait. I have a theory...

ETA2: Okay, that worked. :-)

Yeah. Thats a pretty nice puzzle, isn't it?

I like puzzles, link to the level please!

I like puzzles, link to the level please!

Sorry, don't remember where I got it - it was months ago. Either the archive or the old forum, I think. Level title is The Phantom Apparatus, by VlachVania.

It was on the knyttlevels. Thanks

Wow. I remember that level. 'Twas a good one.

I've just finished it. I wouldn't call this level a puzzle, but it was great anyway