I think their policy is to replace your perforated Chrony for about half price. They also offer trade in credit when you want to upgrade to a new model. My Chrony has been going strong for more than 10 years, no perforations yet, but one set of sky screens did get cut in half.
The shooting chrony can be had for right around $45. Call them and ask them if they have any refurbished models. I bought one, it works fine, is very easy to use, and is compact.
, well kind of, I think they offer some sort of trade-in if when you finally get around to shooting it.