Just installed my new BBQ Guru on my Bubba Grill 250 R. Took off the dampners and made a plate to cover. Mounted the Guru bulkhead adapters to the plate I made. Didn't want to cut any new holes just yet. Got a good fire going with the doors open. Temp got to 230 then droppped to 200. Installed the guru fans and was back to 230 with in 5 minutes and has held there for 1/2 hour. Bumped the temp to 240 to see what happens. Wiull post results later but so far the thing is great!