First: Constructive: On the ME Super: I take it that the "stuck" behavior happens with and without the winder? These are pretty simple mechanical devices relative to today's DSLRs. It's too long for me to know for sure on this camera, but the LX was prone to the foam padding that the mirror hit on exposure becoming tacky. You'd fire, wait, then hear the mirror plop down. It would be only the first exposure after an idle period at first then become more frequent. The fix was to send it to Pentax to replace the foam. Whether that's possible now, I dunno. You could closely inspect the edge of the mirror for black residue. That's a front-surface mirror, and so is delicate. If you were going to clean it, I'd use 70-90% alcohol and wrap a square cut from a microfiber cloth wrapped around a cotton swab. Probably the delay on the winder is the body telling it that it's not ready to advance.
Hah. We may be envious, but more likely you're the Pied Piper, which makes us either disciples or me an expatriate relative.