[Kurt in NJ]

I didn't know that it wouldn't work with a 4" cutter and multiple passes---6 cyl BMW, "lapped" with 600 paper to be pretty-, 4cyl Saab,the lines are optical, the line showing from the 2nd pass is almost optical(less than .0001), 3 passes on this head, started with a head warped .028 the long way, .008 the short way, removed .011 from the head after straightening ----A 6cyl Benz diesel is a pain, can only get the mill off the head at 1 end, takes 5 passes, havn't tried iron, have an old Van Norman grinder for that.