thanks for the info.
I ran across this:
"The 'V' groove faces the crankshaft. At the big end it has a hole to lubricate the crankshaft pin with oil (mixture) received from crankshaft rotating valve and routed by this 'V' groove.
Then the flat surface of conrod faces the backplate."
I ended up assembling my engine like that. I very gingerly tightened the screws , turning it all the time. I seems to feel good. Really smooth actually.
It would be nice to get a comment from TT.
It would be even nicer if they had some DETAILS in the manual. DO they think we won't me working on our engines?