standard procedure for the pros is to have the 2 seams opposite, or at the least well offset, it shouldn't really matter top or bottom if you've cut the rubber to butt up tight
"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir "When we tug a single thing on an old truck, we find it falls off" ~ me Some TF series details & TF heater pics
