It seems to me that every Mountain Instructor or Guide who happens to be bored or short of a few quid these days,feels the need to inflict yet-another of these things on an allready overburdened market!?
Dont get me wrong!? Some of these are quite good,even amusing,if not a tad repetitive,and thats the problem i have with them!
A load of the same old rubbish (much of it from natural-fibre,static rope days.) is trotted out time after time like Great Grandads old photo album. And you just "know" that the lazy bugger who copied them from a thousand other similar publications in the past,has never even tried those techniques,as they are unworkable and virtualy useless!!
I refer in particular to the realy "overcomplicated systems" that would confuse an Einstein! And allso those horrible abortions known as "unassisted hoists",that short of being raised as a Lowland Gorrilla,you would never be able to get to work! (I know!? Ive tried them all!!)
I am allways on at people to broaden their ropeing knowledge by checking out ARBOR,MARINE, and IRATA techniques.Ok, so a lot of it is not applicable but every so often you come across something thats a little bit magic,and thats not only useful its allso great fun!?
Dont be afraid to experiment with alternative hoist and pulley systems that will work for you! The above picture is a heavier version of the "6 to 1" system that i modified from a Dinghy Vang.I just replaced the rope with 5metres of 7mil Perlon,and now i have a Super Lightweight (180gm) hauling system that can pull a small truck! I added a Krab on one end and a good strong Prusik on the other,and now have an instantly workable tool that can be used on everything from "crevasse rescue to unassisted hoists"! At £15 thats not a bad result from a stall at a Boat Jumble Sale.?!
Dont take just any old written technique as Gospel,you are just paying some lazy assed bugger for a book you probably dont need?!
Play with your own ideas! Improvise,adapt,and practice safetly to see what can work for you!