Does the blow-off gasket always need to be on the top of the fermenter? What if I installed a grommet into the side of the fermeter, as close to the top as I can without rupturing the plastic, and then attach the tubing? I would like to stack 2 gallon buckets as fermenters with lids on, but this doesn't seem possible if I drill the blow-off valve into the lids. Would appreciate any feedback or thoughts, thank you!!