for what it's worth jpar, I consider yours a backyard budget build. you have done good with very little. well done!
I was the one that figured your combo could get into the 10's with a few tweaks.
Doubtfully with the cam that I have now. I know for a fact I could have got it into the high 10s had I kept at it and kept working towards that goal with that combo.
Now it's more of a streetcar I can take to the track.