Durso standpipe still needs a hole drilled, but if you drill the side pane you don't need the partition. Instead, you can house the downpipe outside the tank, and the only thing you'll need to hide is the pipe entry. Here
's a shot of mine -- forgive the patch and mess, long story
I was thinking you could do it with very small diameter pipe since your flow rate won't be high. If we both make the SCAPE meet the week after Easter, you can have my glass cutting bit if you want, btw.
As you probably know, there's also HOB overflows, which don't require drilling... maybe it could be done on a very small scale with some acrylic work or a cool container?
Only for clarification, the reverse siphon thing is on the return pipe to the nano. Water will back siphon until reaching a siphon break (a hole drilled into the return line, just below the water surface of the nano) or the pipe entry. It sounds like your pump will stop it for you, but if you drill the bottom of the tank for the return, I suggest a siphon break anyway for redundancy, just because I've back siphoned with a couple different pumps