I'm happy to say that now that I have some larger fermenters, a 7.9g Speidel and a 7.9g stainless "Vessel", my 5.5-6 gallon batches really don't need blowoff tubes anymore. I am sure I will run into a yeast/fermentation that makes me change my mind, but very happy right now. I got really tired of trying to keep the larger tubes cleaned, dried, sanitary between uses and mainly switched to the aforementioned 3 piece airlock conversion to small diameter blow off tube and was much happier