Well, after about 2 gallons on mine the bottom of my con rod fell off rendering the whole engine useless

I bought GRP because of longevity claims. Broke it in heat cycle method by the bible. Always ran with good smoke stream. To have that happen, along with the fact that I could never find bottom end in my TRUGGY. I went with something else.

NOW, there are plenty of happy GRP owners, it IS a good engine, but I will never run one again unless its a screaming deal, and for truggy I'd go with a .28.