ok, I spreaded the word and I got two people to try.
One guy with PK550 had a great success. set_up to max clockwise, vy to max counter clockwise. He only gets misfires after a cold start for 5 minutes. After that, all's well.
The other guy was not so lucky. He has PG20 to which I immediately thought "Oh, Rob80b's panel!" but no, it wasn't PG20/25 like he has, but actually a G1 panel which strangely also shares the same name.http://188.8.131.52/contents/Displa...T-HANDBOOK.pdf
I asked him to locate VA and VS, but he couldn't. He could only find set_up,set_dn,VSC,VZB, and VY.
According to him, he turned set_up fully clockwise, but strangely no effect. Fully counter-clockwise, still no effect.
Set_DN : Turning clockwise, he suddely gets a white splash light. I knew he pushed it too far. Turning counter clockwise, messy misfires, yet still no obvious changes to the black.
VY : Just varies the amount of misfires shown, but not really doing anything to change black.
I'm curious as to how the G1 behaves, but without actually owning one, I'm helpless. (I only did it on my PT350)