I had enough of the damn Habitrail fly-wheel. It's the worst of all the wheels I ever had. So today, I decided to rearrange Kopi's cage again and remove the wheel. I installed a quieter wheel instead. Also, to replace the area of the fly-wheel, the mushroom was once again brought out, after 4yrs of storage.
Then again, now I am thinking, can fat Kopi squeeze into that mushroom???