Hi Len, I don't know if the Heki is the same as the one further down the page posted by "Happyjack". He has posted photos of his modifications, it might be worth contacting him about the job.
Hi Len, just had the same thing happen to ours. Managed to fix it with a little ingenuity. Happy to take some pics but need somewhere to send them.
Larry
Len, sent you an email today. As explained, I will have our camera back Thursday and will be able to take a better photo. Alternatively, if you can't sort it out, we'll be in Pimpama early May for about a fortnight. More than happy to get together and help you.
Larry