Tuned In: Having thought about it, adjusting rudder trim below ACH, crap idea. Thinking about it, a few flights ago I did a few circuits without rudder trim to save me from adjusting it on finals, and I didn't find applying the required amount of 'leg force' continously a problem at all. I think that I've subsequently continued to put in trim because my instructor has recommended that I do so. I agree, theres no point using it unless in the cruise for the reason you mentioned in your second to last post.
PAPI-74: I won't be using trim in the circuit again, unless my leg begins to ache in which case I'll remove it on base! I'd like to try using 76kts at the threshold, but the FTO states 80kts. If I get chance though, I'll try using this speed to see the difference.
I think that the issues are that I shouldn't be using rudder trim in the circuit, and should use Vat=76kts, both contrary to my FTO's operating data. Well, if I ever fly the Duchess myself (i.e. at P1), I'll know what I really need to do!
POL