Is it possible to strengthen the Thrust (resistance) Adjustment on the Taurus Throttle?

[Snacko]

I've used the Allen Wrench to turn the resistance/friction up all the way on my Taurus throttle, but it is still more loose than I would like when I push the Lever all the way forward.

I was wondering if anyone else had this issue?  And if there was a fix/hack for it??  To make it tighter/more friction?