Awesome, that's exactly what I was asking. I won't do an inverted Amac then for them. You know how Avics are, they like to camp out right at the top corner of their enclosure no matter how tall you make it which makes opening a lid really annoying cause you ruin their little hammocks they have everywhere. I know what psalmo's are like, they're often near the top, but, if they've got cork to attach to they often leave the top alone. Nice, I'll stick a piece of cork in the middle of the enclosure and he can web that and burrow around it.
This is generally true with all the Avics I've ever raised. I rarely have Avics exclusively at the top. Of course I see it plenty, but rarely experienced it. Webbing on the cover, sure, I don't let that bother me nor their hammocks, husbandry surpasses my concern for their hammock.
That's funny, mine have always built these really cool tunnels around the top pretty much ignoring the cork other than to use it as a step ladder. I still include the cork anyways because it's a convenient place to glue a water bowl. Though, my Avic enclosures before were front opening, so that may have been a factor.