AM14U3 chassis with mecanum wheels?

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Here is an early iteration of our 2016 stronghold chassis using the AM14U2. We opened up the holes for the 1.125 bearings. The Toughbox Mini's rest on the flange of the inside chassis rails. The holes on the outside rails break into the other punched holes but we had not troubles.

PS. the holes we cut using a fly cutter because they where not on center of the existing holes.