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@Dammit
Up and out early this morning to meet the chaps at the engineering company that have been making the tappet-carrier for us. Rolled up to their unit (just outside Luton) at five to eight, then spent just over an hour perving over their impressive machines - the CMM that could measure fractions of a micron was impressive, as was the upper surface of our carrier being within 1 micron of perfectly flat.
Carriers measured and wrapped, we headed to the engine designer, arriving at just before 12. Three hours passed in what felt like half an hour, and we agreed what we are going to do in a number of key areas.
We're going to use billet cams, which means that we can actually re-space the lobes (they're slightly off centre normally, by design to make the tappets spin) in order to use the domed (and therefore pinned in one orientation) cam followers that we've decided to use. We're going to increase the valve size, because why not.
At this point in the day I'd had a single cup of decent coffee, two cups of instant, and six dreadful pain au chocolate, so headed for home, passing two car-fires on the way back from Cheltenham - people using cars for long journeys that have been parked up for ages maybe?
Rolled up to home at half five, having been on the road for 11 hours, covered 300 miles, and used a tank of fuel at 28.5 mpg.