@Corbs , just curious why you disagree with this. The bottom right of page 14 of the document he linked does provide details of how to connect a 230v controller.
I have re-read it, and I believe I did state that you can remove the cover providing you don't break a combustion chamber seal. How is what I've said incorrect because as far as I can tell, you're saying the same thing.
It wasn't his comment that got him some guidance. I don't believe I have provided a step-by-step guide on how to do it, just pointed him in the right direction which is what he initially wanted. I would consider a step-by-step guide to be far more detailed. But I'm open to a discussion about it and I'm not afraid of making a mistake and being corrected by staff with more experience.