thanks Mach,
today i match ported the spacers. takes about 30 min/port, took me 3 hrs incl pictures and a couple quick breaks.
first of all, safety gear!!! i went a little overboard, i am sure a dust mask would be fine, but i had the respirator handy!
and the tool, dremel with 60 grit sanding drums. i used 1 drum per port.
went pretty well, i started on one end, and got the opening close to the line, then slowly worked it to about 1/2 the line, then i flipped the spacer over and did the other end of the port just the same way. i then started leveling between the ends, being careful not to hit the ends anymore. go slowly and check often. the pattern and dust will help you judge when it is close to flat.
first port;
i then checked in a few places with a straight edge, and evened a few spots out, until i was happy with the surface.
after 3 hours or so, all done;
compare the before;
to the after;
hopefully it will have been worth the effort!!!
tomorrow i'll start on the heads!!! wish me luck!!!