I can tell you now that I had heaps of problems with the main jet needles, the ones in the slides, if your not really into mechanics, and try it, have heaps of tools and patience, don't touch them unless they are really worn out (in my opinion), there is a circlip down in the slide body you have to remove to get at the jet needle holder (plastic thing), that circlip nearly sent me mad, well perhaps it did, who can tell ??. Hard to get at, circlip pliers I had just wouldn't clip in, even bought new ones, didn't work, just gave up and changed everything else for new from the kits I bought, the needles in my carbs are stainless so they are like new, replacement ones are brass, so I left them. Well I lie, I did get one apart, changed everything, now in the kit are new tiny little clips to put on the needle in the middle slot (5 slots), this "new" clip was as weak as dish water, after giving up on the other needles and getting the carbs back together, guess what clip let go cause it was weak and dropped the needle, yep the one I did, so I had to pull it apart and I put the original needle and clip back in, it takes a while but I learn, hope you have better luck if you try it.
Also found that the idle jet is under a large brass screw in base, ok I thought .. easy to change to the new one, undo the screw, look down hole, see idle jet, unscrew jet and go to remove, seems the body of the jet is a tad wider than the edges of the threads for the brass screw cap I just took off, couldn't get them out either, perhaps someone had overtightened the srew caps and made the thread edges "swell", who knows, but it was another thing I left in, so out of a full carb kit I changed a few things, have new bits left over, cleaned it all really well, put the new float needle and set in, checked the fuel levels, all were out (too high), adjusted them and all is well.
I am not telling anyone not to do what they have to, if you want to do the whole carb then do it, this is just what happened to me, just letting you know, cheers Pete
P.S. i'll add a photo of a carb kit I got so you can see the parts, perhaps seeing them will aid you in pulling them out ??, the "tubes" that are part of the main jets, the bit the needles slide into are in firm, not really hard, they pop out up towards the needle and press back in, had to just give them a bit of a tap.
Kit :-