Yes that is Phil Williams from the UK. He also is very knowledgable about YS engines and I will say his recomendations are good.

I tend to shoot a little higher on the rpms than he recommends but not too far off. Example is he says the 91 should be about 8800-9300, I'll go for a bit higher rpm and less load and say mid 9000's

The 91 and 110 are basically the same engine in this case.

Following his recomendations you will be fine.

Troy Newman
Team YS Performance