Hey Jim, I've been doing a little research on the Auber probes lately, and am convinced that the only way to permanently mount one is to use their permanent mount probe (order from Auber). Their probe has a thermoplastic insulating base to it, and the size of the probe is designed for permanent mounting. The insulating base eliminates a problem common to the double-wall stainless smokers - the wall heat-sink effect. If you mount a metal probe to the sidewall, the temp it reads will generally be lower than the actual box temp, due to the heat-sink effect of the sidewalls. Here's a screenshot from the Auber site.
Anyone have one of these?