I have a Mexican Cactus 2″ column that is 54″ tall at the first bend 6″ to the second bend and 12″ up with the coil condenser inside. I have the column packed with stainless steel mesh and running about 30 lb. water psi. to the coil. my boiler is a 8 gal. stainless milk can. When I try to run total reflux for an hour or longer before collecting, my column floods over the top at about 154 deg. What is my problem?