plaster walls with rapid set (all the low points) then use your 1800 feather edge from the bottom of the wall and pull it horazontally up the wall, this will shave off all the high points of f your rapid set. It doesnt need to be perfect as long as it is reanonably straight.
I've done a job about 4 months ago and i have saved the pics in members photo section (saved under woody 1) long story.
Some of the threads in the tiling forum that have had a lot of views are being bumped up into current discussion. Just walk on by if it's not your flavour right now. Perhaps it'll help somebody out one day, and they become members, and then they post a thread, and professional tilers respond, and then you learn something from them...? Maybe?