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... Still, have managed 3 hours in the shed this week at end of day, so small mercies do arise!
Never had a Caterham, but this Locost 7 I built from scratch represents a lot more shop time than driving time! Started in 2004, donated to my son in TX as a running, driving, but brake-less chassis in 2014. He's an aircraft mechanic and former professional race car mechanic. He plumbed the brakes, converted the Miata motor to Weber carbs, and added the (unfinished) roll bar and aluminum skins. On a visit in Feb 2019 I finally got to drive it on the street around his neighborhood. What fun!
You might want to warm him - that twin weber DCOE config (carb intakes outside the bonnet) is extremely prone to carb icing
Only time I ever suffered carb icing was on a Formula Ford 1600 engine. Could not understand why the revs kept on rising, till took engine cover off and saw large block of ice round the carb. Quite disconcerting.