don't know if it's of any interest to you but I recently rebuilt a pair of HS2's (smaller version) and there are some pics here:
https://www.theminif...-998/?p=3771635
I found the strip down and rebuild relatively straight forward but I did watch a few vids first to make that easier. the hardest (fiddly) bit was getting the choke return spring back on, but that was just a case of patience, a bit of dexterity with a couple of small screwdrivers and a few choice swearwords
I spent a bit of time on the buffing wheel to get them nice and shiny as well, a bit more work to do on that but they're pretty much done, it basically makes them look new again with minimal effort
the spindle as Ethel mentioned, mine was a little looser than I liked as well, the correct answer most likely is get them re-bushed, but the wear on mine seemed to be mostly on the spindle itself instead of the body of the carb, I chose to replace the spindles and actually found some manufactured with rubber O rings to help seal. now whether that is a good long term solution or not I'm sure others can advise but I will say I was only happy to do that because there was fairly minimal play to start with, it was more of a 'just to be sure' than a 'fix'
getting the jet lined up with the needle takes a few attempts and some patience, assuming no physical fault or damage to the piston and carb body though it wasn't really all that difficult. plenty of guides and videos around to help
be cafeful when you connect up the jet pipe to the float bowl, it would be easy to put a kink in the inner plastic tubing, and that won't help flow, the outer metal spring like casing will help protect it but only so much
one thing i found an issue was various cars used the A series engine with that carb so you might find if it comes with a manifold it might be the wrong angle for mini fitting. other manifolds are easy to find and not hugely expensive, you would also need a different float bowl adaptor to sit at the right angle. but if it was listed as taken from a mini, you're probably fine (I think mine came from a sprite maybe)
Edited by stuart bowes, Yesterday, 01:09 PM.