Hey there Winslow,
I opened up my gauge cluster and snapped a shot of the bit you asked about. I measured it as well, I figure it's about 7.5-8mm or 9/32nds, I cut out the two circles to cover the split gauges and to hold in the light around the indicator lights, then fixed them to the lexan. Let me know if you need any other info. Great progress on the crew cab its really coming along and looking good! Yeah I dig your regular cab with the Cummins, very cool truck and I love that burgundy colour.
