Your explaination worked. I now have programmed pistons which still work after closedown/reopen. Thankyou very much.
I noticed higher up the thread you were asking for suggestions for additions/mods. For my part more pistons (say 12-15 in total) would be extremely useful.
Overall the organ has an excellent sound ... I particularly like the "chiff" on some of the pipes. The screen graphic looks very well indeed.
I will be using this organ often for my practice for Sunday mornings.
Thank you again,