Hi Kram
I second that! I have spring air type uc on my VQ P38 and the nose gear frequently fails to lock down due to weak spring vs slipstream. I usually have to conclude each flight with some rather non-scale aerobatics just to get the F$%*en nose gear to lock down. Im thinking about fitting the Robart 105 deg spring down unit.
My P38 flies ok on a pair of OS 70 surpass I woud not say that it is over endowed with power