Dear Jo.
Sorry to read of your problems I hope all goes well for you, a glass of Red has been my last thing at night since my near death encounter 13 years and counting. I'm pretty sure all here will be " rooting " for you.
Kind regards, Graham.
PS. Jason. If you want to start a thread for the CHUK engine I'd be glad to collaborate. We had loads of fun with them, many different ideas for valve operations.