Thanks AVB

. Unfortunately I don't have an air compressor (yet.. but am currently looking at getting one).. perhaps there's a small fuel pump I can get (with adjustable pressure) that will allow me to connect to the inlet and pump ??
[EDIT] I came across this while googling..
eBay Fuel Pump #1 Apparently the pressure is 0.032-0.045 MPA(Megapascal?) which = 4.64psi - 6.52psi
It's a cheapie and only comes with the pummp, but fuel lines i should have some lying around here something.
Alternatively there's this one which comes with extra bits'n'pieces but $5 more.. not sure if i'll need most of the extras...
eBay Fuel Pump #2 Having a read through your suggestion, Im just trying to picture it, but am having a hard time. Your saying, turn the carb upside down (with fuel bowl still on?) and pump fuel @5psi into the inlet into the carb ? Gravity should keep the needle in the seat and if there's a leak @5psi.. you know there's an issue with either needle, seat or both ?
Regarding the polishing.. I actually watched a couple of videos with people doing the same thing with the seat area of a carb.. apparently they say it can work well. There was one video (trying to find) where a guy did just that with a bbq bamboo stick in a dremel + metal polish and apparently it worked like a charm.. might give that a shot too just in case... though what would be the chances of having to use a bigger/fatter tipped needle ?