I've too got some experience. 8-9 years of driving and now a year as a mechanic for a Kart Driver. I've been to European rounds and stuff.
With that I've got experience with both the Max and the DD2 engine.
I wont denie that he has got experience but can't he just have 1 positive thing to say about any engine except the TKM?
Rye House back around the late 80s to early 90s sort of time.
I think the engine might still be in my brothers shed but we threw my chasis away. It was a Solo chasis, purchased after 1 year of use by the works Solo team by my brother, who then swapped it with me for a computer.