Just a bump and a quick report. I ran in the sts .28 this weekend. I am really happy with it. It still has breakin shims and is very rich but will wheelie my very heavy 6.5 kg savage after the rich low end clears out at about 3meters. My STS engines arrived completely clean of any debris and I must say they were in the best shape of any engine I have ever purchased on initial inspection.

Thanks dino and sts for your help.