Oldsteve,
No need to worry about drilling holes in the smoking chamber of the Good One. There are two opening on the top corner of the smoking chamber where the lids closes down. The probes & wires go through there very easily. You can put both in one side or one on each side. It won't pinch the wire or crimp it in any way. I found out after using it several times I just started using the thermometer on the lid. Its very accurate. You are going to love this little off-set. They really rock the BBQ. Hope that this helps,
4cornersmoker