Aha! Now I have an excuse to try your Unicender. Come on over to the house and I'll show you my technique, but bring that Uni along. OK, Burnham??
Nah, just kidding. I'm happy to show you anytime.
It's the Victor Out O'Site that I use. I tried the plunger style for a year, but finally tossed it in the garbage. I've had numerous conversations with Victor about designing a smaller Out O'Site for the juveniles, but they just had an I Don't Care attitude. Then, a few years ago they cheapened the model by using a lower grade steel and a thinner gauge. Two broke. They gladly replaced them, but when I offered to send in the broken ones to examine, they had the same crummy attitude. So if my cat can't get the little ones, I have to wait several weeks till they "grow up," meanwhile wrecking havoc in the yard.
There are lots of videos and everyone has their own technique. More than one way to skin a cat, so to speak. For example, in that video, I don't cover the trap. Tried it both ways, makes no difference. I put up a little landscape flag so I can tell from a distance if I have a taker. I know moles have a good sense of smell so I wear medical gloves to help minimize my scent.
Too much info. Feel free to call me.