Anti-rotation washers (non-turn) washers in non-parallel dropouts? I have a Shimano Alfine 11 Interally-geared hub and am fitting it to an "M5 559 shockproof" recumbent.  The wheel is built and true and runs nicely.

However I have a problem with the anti-rotation washers and my dropouts.  The upper and lower edge are not parallel - they diverge at about 24 degrees.   The dropout is not damaged or bent open.



Normally this isn't a problem, but an IGH needs an antirotation washer that looks like this.  The "5L" and "5R" version is what I have.



The problem comes in that the tang on the washer is way smaller than the angle of dropout.  



I think the washer's tang should be pressed against the lower part of the dropout, because the hub will want to "roll" forward under tension from the chain.  That is, NOT as pictured.  

Your thoughts?   I know I will have to get a set of 7 or 8 to make the cable entry angle work better, but am I risking the health of the frame's dropouts by putting an IGH in at all?
The torque that the axle sees relative to the frame can happen in both directions as gears change.

For example in the classic Sturmey Archer 3 speed, it's the second gear that is neutral and does not place a torque on the axle.  In third gear the axle will try to twist forwards, and in first gear it will try to twist backwards.

For this reason you really do need an anti-torque washer and you can't leave the gap in the second picture above or below.

I would try to use a normal anti-torque washer against the inside face of the dropout.  This washer will have the square hole to grip the axle.  Then I would try to make a second washer-wedge-combo out of a softer metal (e.g. Al) to go on the outside.  The wedge part of this piece would fill that gap between the red lines in the second picture, but it's strictly functioning as a wedge and can have a round center hole.