Okay looking at many of the responses, I got similar feedback and it all sounds great. So here's my idea. If I drill all of the holes the same distance etc. Exactly the same, but then cut incrementally more off of each one so that I end up cutting a full spacing-between-each-coil distance off of the last one. Then when I mount them flush, each hole will be progressively closer and my primary will be nice and spirally. I AM drilling slots rather than holes.
Thanks to all who answered,
Tyler
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