Your problem really is that your
batten pipe is rolling, so fix the problem, don't treat the symptom of your problem. I'm not an LD but it does seem to me that you could achieve that lighting angle without yoking the instruments out so far.
Assuming you really DO need to
yoke out your instruments that much (because it occurs to me you may need the
instrument slightly higher to achieve a preferred angle but the length of your
soft goods prevents from just taking the
batten higher, right?) and assuming you have the space on the D/S side of the
batten to do so, you COULD hang &
yoke out a few additional instruments as
ballast opposite these ones. You probably don't need to hang instruments one-to-one; maybe one
ballast for every two
instrument - just to get the pipe to "
roll" back closer to where it belongs.
The side arm
stiffener doesn't NOT work, but it seems to me that it treats the symptom and not the problem? Balance your
batten and you should be fine.
Good luck!