Originally Posted by WhyFi

Get the injector. Skip the Stan's, get Orange Seal instead.

One note on the injector: some valve stems won't pass the 3mm hard plastic tube all of the way through - many have a little tight spot inside where it'll bind - so if you can't get it all the way in, try another set. The alloy ones from Muc-Off will definitely work, if you're having trouble finding some locally.