Sucks to hear the bummer news about GRP.
AFter greasing the o-rings for the HSN, LSN, pinch bolt pieces in my carb and sealing the back plate, the engine is working great now. I can't believe it still has that much power with a 6mm carb insert and yet only runs 200-210 degrees. It's just crazy after what I'm used to in the past years. Loving it and hoping GRP will pick up production by the time my engine wears down. LOL