Approximate lemon rate of OPLab for OP-Z?

Almost scared to ask this one as I don’t want to foster negativity… TL;DR at bottom.

I am absolutely in love with my OP-1, OP-Z and PO-32.

(The less said about the faulty 33 & 35 I returned the better)

I have run into a limitation with the OP-Z where I can jam live with my midi controller (Nectar) into the USB or I can record to my laptop through the USB but not both.

Given I also have the OP-1, PO and shortly the Deluge I assume the correct solve is not sticking a Zoom at the end of the chain for recording but getting an OPLab for the increased connectivity and to free up my USB slot?

Having read the horror stories on the subreddit though I’m concerned about the amount of potential lemons. Because I travel a lot I’m not home long enough to potentially return multiple oplabs to the retailer until I get a good one.

TL;DR - Would anyone hesitate a guess as to a percentage on getting a working one versus a lemon?