Aghh. I don't know why, but every time I do a new brew thing for the first time, I don't think it through, then realise I forgot something, then go into panic mode. Same with my first mini-keg.
I worked out that I could use my auto-siphon, outside part removed, attached to my fermenter tap. The "hard" plastic bent tube part of the auto-siphon, with the rubber seal on the end, just manages to fit into the hole in the mini-keg. Up to then I had been wondering how I would do the transfer. Had been thinking about my little bottler, but was a bit worried about the little plastic push part of the valve scratching the plastic coating at the bottom of the mini-keg. So was pretty happy with the auto-siphon solution (the "auto" part out of action of course; this was tap & gravity only).
So the 5 litres was very successfully transferred, plug put in place, keg rinsed. BUT.. oops, forgot to put sugar in
. So then how to get the plug out? Didn't come out by hand, way too firm. So went to get the pliers. Still very hard. Then I ripped a big chunk out of the side of the plug. Well I couldn't just leave it, and I couldn't push in the plastic stopper part of the plug because then I'd have to drain the barrel to get that back. So I did one last firm pull of the plug. But there was no way it was just going to come out, and in the end the plastic stopper popped into the keg. Once the plastic stopper was in the keg, the rubber part of the plug came out easy. And of course, I then realised I had 4 other plugs with plastic stoppers and could have just pushed the stopper through from the start. Anyway, 15g sugar added and a second plug put in place. I realised later that I did have an earlier plan to put some CO2 into the keg, but had completely forgotten about that.
Oh well, all should be OK. I know now.