Had nothing new to report over the last few months so I've been rather quiet.
I've not been happy with my zeb tank set-up and since nothing has been happening in there I guess they weren't happy with it either. I've swapped it around a couple of times over the past few months and decided that the basic set-up I'd started off with, pic of set-up in gallery section, was the one I prefered. It would seem that the zebs prefer this set-up too cos this is what I saw last Sunday night:

I assume since that was a week ago and that the male is now sat back at the cave entrance I should, hopefully, have some wrigglers. I've tried looking in his cave but he makes himself look huge and I can't see a dam thing. I've looked around the tank and he doesn't seem to have ejected any.
I also noticed, yesterday, that another of my cave dwelling males wasn't sat at the front of his cave as usual and this is why:

I'm gobsmacked!!!! Nothing has happened in what seems an age and then BOOM!!!! - two in a week.
Question to Rob, Adam, McEve, Barbie etc (Successfull spawners)
Is it normal for dad to block the cave entrance so wrigglers can't get out? and I can't see in. I'm eager to see some wrigglers but don't want to piss him off.
I assume dad doesn't leave the cave til lights out to feed as he won't have eaten while guarding.