damn it sold out it in under 10min! its very neat they still had stock lying around though. i wonder what other goodies they still have 
Maybe some rumble modules? The Line module gets all the hype, but I LOVE my rumble module in the OP-Z. Probably one of my favorite things about it tbh and one of the first things I missed when getting the XY.
yeah that thing is sick! totally agree. i think both oplab and rumble have never not been in stock though. at least in the USA ive always seen it in stock and 50% off too.
I have received the rumble module (ZM-2) last week bought with the 89 → 39€ discount (still available in their store) to my recently purchased 2nd hand OP-Z. I really like the feedback it gives. But I needed to force it into its slot during installation, not that I inserted it incorrectly. Not sure how I would pry it out (after unlocking) if I wanted to swap. Anybody else experiencing this tight fit?
I have set up notification for when the line-out module (ZM-4) becomes available, but I did not even get that email 
that is odd, it shouldn’t require any force really. did you read the manual about how to install it with that little plastic tool?
Sounds typical for an op-z with a chassis that is bowed/bent.