Well grooser is the wrong word,mean the high comb or flange on plate, this end should be where shoes are wider, please look in this vid at 10sek, if you stop you will see what I mean.
http://www.youtube.com/watch?v=mfkprEuFg6o
Not to be picky, only trying to help, position this or that way will not effect the amount of work, only giving a result like the proto.
Dan