It would appear that reading that damn manual thing is a fine idea after all. So far I've ground my tools by eye with grand ignorance of the detail.
After reading the responses to my grim finish (and having another go with the original tool) I set too to grid a tool to what the pundits say it should be.
The result after a 5 thou cut at 5 thou per rev and 400 rip looked like this

Compare to the pre-spindle 'bad tool' cut on the left of the bar.
A 2 thou finish cut was even better

Though I admit it's hard to tell from the photo. My phone doesn't much like these type of shots.
Iain