I cut out the bottom of my Mini. I use the tamale insert as a diffuser. When i want to go low and slow I use a terra cotta saucer wrapped in foil under my bottom rack. If I want to go hot and fast I just put a cheap pie tin under the bottom rack for easy clean up.
I have gotten my mini past 325 and held as low as 200, great cookers for either low and slow or hot and fast and very efficient with the use of fuel.
*Weber Mini WSM* *Weber Touch and Go Performer X3* *Sublime Smoke UDS* *Maverick ET-732 * World's Fastest Blue Thermapen **Pitmaster IQ110*