Glad it all worked out so well, Johno. By the way, I forgot to answer your question about honing speed. If you watch it being done on new engines on a production line, it looks like probably less than 400 rpm, with plenty of kerosene being pumped over it to carry away the grindings, and the hone moving up and down full stroke about once per second. The forward and reverse cross-hatches are at something like 30 degrees to the axis. The reason to remove the ground-off material so vigorously is so that it won't get run over by the next honing stone, which would make scratches. It needs to be kept wet with low-viscosity oil-based material, and if you can't flood it, you need to stop frequently and wash both bore and hone. (This is very similar to filing when you want a good finish.)
I'll close this thread.
