Finished off the roof so thought I'd finish off the thread.
So the issue I had was actually that I hadn't removed all the nuts which hold the rail in
. Instead of the 10 (5 a side) listed in the helpsheet there were 12 (6 a side) and the last two were hidden requiring a box/socket spanner to remove, similar to the hinges at the back, I don't know wether this is specific to my Bongo 1997 and that's why it differs to the help sheet, but it's worth noting to anyone else who does the job there might be more than 10 10mm nuts for the rails, and if it doesn't come up easy there is something wrong. Another thing to mention is while bongomad said to do it, I think because he thought I had removed all the nuts holding the rail in and still couldn't get it up, you don't need to remove the gas strut nuts. I did have tremendous hassle getting these back in as well as the hinges at the back, back in. Try to at all cost avoid taking these out of their holes. Anyway regards to motor servicing they actually looked in pretty good condition with only some rust on them, tried to open them up but the screws were completely seized, connected the one that wasn't working up to a 12v transformer 10amp and blasted it with some power got some sparks from the connection between transformer and motor... held it on for about 15 seconds then flipped the polarity, suddenly it burst into life. I put some silicone around the join between motor and gearing, and they have been fine ever since. Onto the next job now
