Lotus Joe,
you went from a Weber 32/36 DGV to the 38/38 DGAS? and a big difference? That would be easier than adapting the SK carb setup.
I did go to the British shop. They directed me to the machine shop that does their work. There was a older Lotus 7 in the window. Hmmm.... My kinda place.
Just talked with them a bit. I've got all the valve cover and carb studs out of head and completely dissambled the engine. Need to have both cleaned at a local shop. Then carry all the bits back for evaluation.