ok i started, but i read on the first page the same but you opend the port there till 33mm ? i did that now im almost done with the inlet ports. I think i screwed it up now? i want to juse schrick 288 degrees.My father removed the guides is went pretty easy i think it last 30 seconds hihi. the valve seat is still in but there is a pretty big edge from the port till the seat grind it away and smooth it. I hope you understand the last part from the valve seat i couldent found the right words for it.