First you don't have to refill it with leather.
I refill mine with oodles of different things. Kailua likes the leather. The slots on it are not wide so you can't use real thick objects but I put papers, cardboard, different ropes, thin wood pieces and such.
Buy all three? Well... this is all I know. Volar, Sakie and Sam all have one. Those are the ones that break things. Out of those three Sakie is the one that breaks things just to break something. Sakie has had hers for Hmmmmm.... at least 7-8 years I think. My hy's WOULD break them so I have never put one in their cage. As an example of what Tiko can and will do.... if any of you have those "crock" bowls? He chews the crock off the cage and chips the bowl into confetti like it is wood.
Tiko can take a 12" long 1 1/2" diameter lucite rod and drop it into 40 quarter size pieces in about 10 minutes.
Seriously. I have people on this forum that have seen him do it.
So, the question is.... does Burt have a little Sakie in him or... a little Tiko?