Is the locking power connector for the mini proprietary? If so could you make it available to purchase as a pigtail for pedal board integrators. It defeats the point of having a locking connector if I’m going to just have to use the adapter cable as is and I’d prefer to not have to cut off the in line barrel connector so I can solder a power cable to it.
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What’s wrong with the adapter cable as-is? Why would you cut the connector off, only to resolder it?
I’m poking holes in your argument, but I think you mean that you want to use a separate power supply. I can’t tell at the moment if the Mini’s locking connector is proprietary. Most locking barrel plugs are the threaded type like this,
…but that’s not what the Mini’s plug looks like. You should still be able to plug a regular 2.1mm connector into the Mini even if it doesn’t have the lock.
Made some photos of mine (QC Mini):
You plug it in matching with wholes in the input and turn it clockwise
Gotcha. Looks like this is the part.
https://www.digikey.com/en/products/detail/globtek-inc/451-02180173(R)/18304674
EDIT: I ordered the part and it’s corresponding jack for study.
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I wonder if the locking connector will be added to later QC versions (not that I’ve ever had a problem with my pedalboard-mounted QC connector). Barrel connectors are pretty fragile, by nature. I think I’d rather have the connector pull out than break off. 
Building a pedal board you generally use a single power supply like a Cioks DC7. The QC mini includes an adapter cable for this use case, but an adapter is more prone to disconnection.
I ordered a Cliff FC6814785 which looks similar
You didn’t specify that you were trying to mount your device to a pedalboard.
Most people who mount their QC (or any other pedals or gear) to a pedalboard don’t have issues with the power cable being disconnected. If the power cable is fixed in place, why would it ever move?
For pedalboard use, I think it’s a moot point to complain about not having a locking power connector when trying to use a separate power supply. Based on how this connector works, you should be able to use a standard barrel plug anyway. It would be a BIG problem for everyone if it was the other way around–only one type of proprietary connector works, rendering all other power supplies useless. I’m glad that Neural chose this type of lock.
It’s up to you if you want to go chop-shop on one of your Cioks cables and solder a locking barrel connector for your Mini. But it’s unnecessary for pedalboard use. The real application for the locking connector is for people who will be playing through it while it’s sitting on the floor or a desktop.
For anyone else reading this, I would especially advise against cutting the locking connector off of your OEM power supply, in case you want to sell your Mini later. It’s possible that doing this may void your warranty.
If I seem a little frustrated, it’s because I can see a wave of people coming soon to ask the same questions with a “gotta have it” fervor.
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Re-read the second sentence of my initial post. Not sure why you have an attitude. It’s the same reason why I use powercon connectors instead of nonlocking C13 connector on client builds. If you use a nonlocking connector on a piece of equipment and for some reason it does become disconnected you aren’t going to have a repeat customer.
As the conector has been identified no cutting is required,