i was just browsing wen i seen this post and thought ad coment ,lol i have been ames taping for 10 years now , first ov all with hand to perfect the use of it then machine taping last 8 years , wen ames taping you use metal flex/corner tape , not the cheep stuff, british gypsum only as the rest is crap and the paper can come away from the metal ,there is enuf strength in it it, it has been developed for this and u can also use it for plastering , DO not use thin coat bead u will get a sharper corner with flex tape , easi fill i would only use for touching walls that have been painted as fast set does not stik to paint unless pvad , easi fill is creamier and takes longer to set,easier to sand etc .... but it sets softer and shrinks,as for sanding as long as u do not leave high lines and smooth the joints in to the board u should not be doin much sanding on it as ur final coat is ur touch up polishing coat , 2 coats fast set 1 joint cement or 1 fast set 2 joint cement