I can't really say. I can only say that the chassis (and it's mounting holes) is a "standard" 5F1 chassis. So if Marsh is making its cabs to fit that, then I would have them drill as well. That being said, if you do have a drill of any kind, it should be pretty easy to do yourself. You only need to get the "x" spacing correctly. Try your best to get the "y" correct, but the holes in the chassis are slotted, so you can slide the "y" up or down so that it fits against the back panel tightly.
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