connecting it to the habitrail will be fabulous
I'm 14 and made my bin cage (with a little help for the drilling part)
With a tall bin its very simple, you can just leave the lid off for ventelation.
For connecting a tube, i drawed round the tube, then drill holes around the circle. Then got a blade and cut inbetween each hole until it made one big hole. (if that makes sense)
then filed the edges to make it smooth.
The dimensions are great, even better with the extra habitrail