Changing Kirby's Tummy!

Yesterday, I changed Kirby's tummy because he's super full! :). (He's my ever reliable vacuum cleaner). I haven't been working on Kirby lately, so I had a hard time figuring out how to change his tummy again. He has refills that we bought and are hypo allergenic ones, exclusively for him only. It's difficult to find one at stores so we order his tummy refills at the company where he was bought :).
As usual, he's really heavy to carry up and down the stairs, but works with good performance.