Well, I suspect that a QR will clamp a bit tighter than the bolt-on skewers. Quick Nuts will allow you to clamp it a bit less tight, but the basic force will still be compression along the axle - quick nuts can't change the mechanics of how a wheel is attached to the frame when it uses a skewer through a hollow axle.
The vise thing would totally solve your issue, and it's pretty cheap. I'd go for taht. I might buy one myself.
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"c" is not a unit that measures tire width