I'm trying to find a way to bodge a S.-A. SRF5(W) hub onto a bike with difficult dropouts. There are two main problems (looking at step 6 of this diagram and also at these part pictures p.15,41 will aid in understanding this description, should you care to do so):
Problem 1: The axle is a bit too short to take all the washers and nuts on the right-hand (drive) side.
Problem 2: The bend in the fulcrum arm is not sharp enough to get around the lips of the dropouts.
Solution 1: get rid of the fulcrum arm (see link 2, pg. 41) and just use the locating washer (I think I can probably prang it off with a cold-chisel). I could then cut the fulcrum arm bend off and attach the straight piece with clamps or somesuch to the chainstay. As I understand it the fulcrum arm is not actually resisting rotational forces (that's done by the anti-rotation washers on the flat-sides axle), but instead is providing a place for the mounting of a barrel-adjuster screw to allow tuning of the shift lever.
Solution 2: hope that someone is going to tell me that I can simply using Fitting Kit HFIS5.PHSV (p.15 ) which seems to magically replace the fulcrum arm, gear selector guid and g.s.g. protective cover with two simpler parts.
Solution 3: try to get a thinner, more steep angled fulcrum lever machined for me ... or mock it up out of soft aluminum. It LOOKS as though it's only function is to provide a mounting point for the barrel adjuster screw (see 3.Gear Adjustment of link 1)