No problem Phil , there is no rush.
I will be in touch August time.
Can I run an idea past you.
From what you have seen removing the engine to get at the centa, might it be easier and less fiddly removing the pro shaft and dropping the gearbox rather than going in from the front and removing the engine? I.e with the prop shaft removed and the gearbox supported by a engine lift , un bolt it and swing it away.
just a thought based on how I saw a clutch changed once ( not on a three wheeler).
Late August sounds good Graham. As to dropping the gearbox out through the floor, I think the chassis rails are too close together to get it through. I have taken the whole assembly out through the front in one piece which means not having to get at the bell housing bolts but brings its own problems. I will get that procedure written up on my site in a day or two. In short, there ain't an easy answer!