OK. A LS6 is a "poor" glider compared to the Nimbus but you could find
some interesting ideas about how to do etc...


Ouch.
Having both, I'd say neither were "poor" gliders. The N3 does require
longer arms than the 6.
The LS-6 lower part of the panel should not be moved aft, or it will
bind on the stick when opening and closing the canopy. The upper
section (above knee-height) couild possibly be moved up to 2" / 50mm
aft before you'd whack your knuckles on it. Unless you (typically) have
instruments with knobs on them. In this case you'd be knuckling the
instruments well before 2".
A simpler mod might be to rework the seat back! Try padding the
headrest and moving the seat back forward a hole or two, and adjust the
tilt. If this works, cut the seat back just below the headrest and bond
it back together to achieve the angle you got with padding.
This also works for taller pilots, as it allows the seat to tilt
further back without the headrest hitting the top of the lift tube
bulkhead.
Jim