ThermoQ -2 questions:

Thanks guys! On the square-bore inlet first... i was actually looking for that bit of Jimmyray's but couldn't find it -then i read that he deleted it! You are right -i actually did sit the TQ on top and thus found it would not physically work without the adapter/spacer. It is not a 4 hole adapter, rather, it has two long slots which are sloped more on the secondary side for obvious reasons. I think it should work fine - the extra inch should be good for extra ram velocity, even if only a tiny amount? I will miss the choke though. As you would know, TQ's do like choke from cold start up. Even when the weather is warm.

Back to my fuel drain problem. I am fairly certain it is not the O rings you mentioned. (BTW, nice photo) I know exactly the ones you mean - i have pulled the carb down at least 4 times, and checked them twice. As i said this problem has only just started happening. I also did have that problem of fuel pooling into the primary bores -you could hear it trickling in after shut down - it took me a long while to work out it was not the carb. The culprit? The damn fuel tank was pressurizing so much due to the FECS (Fuel Evaporative Control System) being blocked, that the gas tank pressure was forcing the fuel through the lines and over-riding the needle and seat valve in the carb ! Easy fix was to install a vented fuel cap. Problem solved.

As for the fuel pump being the cause - someone else said exactly the same thing. Maybe something inside the pump is letting the fuel in the lines run back and this is pulling fuel out of the float bowl? But doesn't the TQ have something to prevent this from happening? That 360 is coming out soon -i'll make sure i put a new fuel pump on and see if that fixes it...