Just for the record, I don't follow Strasser either, I did start down that trail, and I made things worse... I quickly switched back to a less radical trim....
I trim to the natural angles of the HOOF... not the shoulder, as the shoulder can change angles... as it is attched by muscle... like I have said many times, I have read, researched, expirimented and learned a great deal over the years, much more then I can type to any list, but, the info is available... I am off to work -- I and my horses love our track system, take a look~~~ http://picasaweb.google.com/dakota.charm/TrackForHorses