a weber well tuned should perform as smoothly as a well-tuned stock carby. i only had troubles with my weber when it was jetted for an L20 (when i 1st put it in my a12).

im currently looking at changing my jets now im using a pair of dcoe webers, as it drinks too much when i floor it a lot. (used 1/2 tank of fuel in 100kms chasing my old man in his e-type after saturday of the bathurst speed weekend). my engine oil temp reached 100c, even with a small cooler!! im changing to 20w-60 oil now!

as for tuning, a friend of mine has been tuning the mixture by ear until i bought a carb balancer which is GREAT, (just like the ones on ebay), it makes tuning a pair a lot easier. they run well but backfire a bit when cold, apart from that theyre perfect. can idle at ~700 smoothly, although i run idle up to 900-1000 when at normal operating temp. cold start idle is around 500-600 at which time the datto is a little wobbly. i dont use the choke on my dcoe's..

ive had no experience with 32/36 down carbs, so perhaps this doesnt apply much.

my dcoe's keep me sane