I put the grommet just below the top grate line so I can run the probes up or down. I can run 4 probes through a single large grommet from cajun bandit.
I aslo ordered the 6' probes after getting tired of pulling the base unit off any table i put near the smoker.
Fast Eddy 120
La Caja China #2
Weber 22 Kettle
Brinkman Vertical Charcoal (out on loan)
Weber Q 200
Weber Summit Series Gasser