Nope! Got a thermowell on the front of your unit already UNLESS you have a regular version Brew Bucket without a thermowell on the front. If you have a Brewmaster Bucket, no problem.
If you have a regular Brew Bucket and you want to do 3 gal batches or something, you can write into support and see if we have extra 300 mm version thermowells to sell you.
Other than that, for those of you wanting to do partial batches in FTSs, then just use the front mounted thermowell.