What bit should I use to drill 17 mm holes into my Chronical???

Some of you more enterprising/handy folks out there in Brewland want to put your FTSs coil(s) on the side (inside) of your fermenter body instead of the FTSs flat lid (so that you can maintain the domed lid for transfers, etc..)

We are now offering a carbide 17 mm hole saw bit up on our site for purchase. ( 17mm carbide hole saw bit) It is made expressly for the purpose or relocating your chiller coil(s) to the body of the fermenter.