You could make your needle valve fit a small socket wrench if you really wanted. Get a nut large enough or bore one out to fit over the needle valve end, glue in place by whatever method...presto!!! Or your could slot the end with a dremel to work with a flat or phillips head (i just make this stuff up as I go, but sounds like it could work. )

Or you could just add the normal extension by using a length of push-rod with a small bend on the end.