Well I did it today. Was a little better, but then mine didnt look all that dirty.
RB20 its basically the same, just one extra bolt, only need to take one hose off, I didnt need to take any others off. Had I not stuffed about and had lunch inbetween I reckon you could do it in about 30mins. I found the cotton buds helped take a bit of the gunk off. It dryed out pretty quick in the sun. Hey its carby cleaner it just drys quick!
This really did help tho, its easy enough but its good peace of mind.
so... THANKS!