HS4 needle question for Spit 1500 owners

["Gambony, Jim" <jim.gambony@eds.com>]

Listers,

Sorry to bomb the "double" list.. I'm looking for anyone who's fitted an HS4
carb to a prepared Spitfire 1500... who'd be willing to share their needle
choice.  (please, no heroin jokes  :-)

I guess I'd need to know what prep work was done to the engine (compression,
header, etc) and what the results were.

TIA

Jim
(DM Spitfire... considering going back "home" to DP)