Thanks all for the suggestions.
I did look into the power steering add-on when it first came out. But I thought I should do the alignment to specs (especially castor) before doing anything dra$$$tic. I think castor may be set too high.
Dennis O. has helped me in the past with brake setup for track work. I'll give him a call.
I've tried higher tire pressures. Running at the correct 25PSI, the 17's and the 425# springs make it a pretty wild (bumpy) ride with very little steering effort improvement. So, I keep it at 20PSI. Maybe higher tire pressure and lower shock dampening adjustment? Haven't tried that combo.
I put on the top today and went for a nice ride. I forgot how ugly that top was! And how all the squeaks and rattles even out the reduced exhaust noise...