Hi

 Thought you might be interested I planed a miniature switch beside the
throttle on the left side to allow quick cutoff of the trim power.  A
trim runaway can be an extremely serious problem which may overpower
even the strongest pilot. A very educational thing is to in flight at
cruise slowly apply full trim on all three axes one at a time to see if
it is possible to fly with a full trim runaway.
    If this full travel is outside of the range needed to fly the
airplane within the weight and balance envelope, it should be restricted
(reduce the travel). This will avoid or reduce the possibility of the
airplane becoming uncontrollable due to accidental controlled or
uncontrolled runaway trim.

Jack Webb
L 360, L IV
ATP, CFI A&I Multi & Sea
Experimental Test Pilot
AeroSpace Engineer
Ohio