I ran there last december and january and arrived with 180 main 55 pilot, dgj p3. In regular maintenance I noticed scuffs on the exhaust side (light light stick) and richened to 62 pilot. No more issues. I ran same oil ratio as you but pure C12.
It ran better after I did that too.
Contact Curtis or Cliff for addiional help. I’m 2000 miles north this winter :(