Ok, that's good to know. I've stopped testing wicks that were working very well because of what I thought was too tall of a flame after 3 or 4 hours. What about soot on the glass after that length of time. I'm using a 50/50 mix of 4786 & 4627. Right now in either a 12oz status or a 12oz madison, each about 3" wide by maybe 3,5" tall. 51z works pretty good, alright HT, no the best but ok. Full MP doesn't happen until maybe less then an inch left of the wax. 60z does the same thing, a little better HT. I have a 62z in at this point, with 2" left of the wax. Just started so don't know about HT. Thanks for any & all help.