Thank you so much, Ozpkchris, for mentioning the use of the condom and leakage control. I rec'd a box of CE3's today, eagerly read the directions (which made no mention about using the condom, btw), filled one and instantly had a puddle of juice on my work table and my hands were covered as well (glad it was very, very low mg/ml juice). My hands were too slick to turn on the faucet due to the juice on them. My wife had a good laugh over that as I begged her to turn the water on. I'd swear you could use juice as motor oil...... it seems slicker than oil.....lol. What a mess. I was so darn frustrated.
I tried the method you laid out this evening and no problems at all. The little black plug did give me some problems using those high quality tweezers included until I stole one of my wife's sewing needles. I then found I could put the pin in the plug at an angle to pry it out and to replace it, I put the pin in the top of the plug to hold it steady and get it started in the hole and finally used the end of a dental pick to push it the rest of the way down -- very carefully.
For me the jury is still out on this new carto. I really wish RS would have mentioned the leakage when filling issue, but what the heck, it's always good to learn something every day. I'll give them some time, but I'm about half the way through one now and starting to get a burnt taste. Hmmmmmm.......