Hey there!I created the diagrams eons ago and I agree that the implementation is really difficult to understand. I'm sorry for that. Can you send me a photo of what you're trying to typeset? I'll see if I can help you out.
Thank you. What I need is really simple, basically the tin-whistle chart with a thumb hole and an extra bottom hole, like this:
Sven Axelsson
++++++++++[>++++++++++>+++++++++++>++++++++++>++++++
>++++<<<<<-]>++++.+.++++.>+++++.>+.<<-.>>+.>++++.<<.
+++.>-.<<++.>>----.<++.>>>++++++.<<<<.>>++++.<----.
++++++++++[>++++++++++>+++++++
>++++<<<<<-]>++++.+.++++.>++++
+++.>-.<<++.>>----.<++.>>>++++