I ran at 35 psi on the Big Bear run this weekend, and I really felt the difference from 38-39. I like the softer feel, and after a few twists it was apparent that my confidence was much higher.
I will try your set up next and report if there is a diff.
I too have the 2cts and 190/55's
Bubba
I'll try softer too. Tell me what you find out.