I have the tunze 9002 on my bio 29 i actually had to install a sump Esshops rs-75 in the stand to get it to work properly. I had tons of trouble getting it to fit in the chambers in the back. nice skimmer though.
I have a 9002 that's been modified for a 28 nano cube. I'm not sure how similar the 29 biocube is for fitting the 9002 in the back but as I understand it, it should be the same. If pumarjr dosnt have his anymore Ill sell you mine for the same price with the skinny cup and stock cup but only if you cant work out a deal with pumarjr