I suggest you have your older scouts conduct the JLT for your troop. They will get more out of it and be a fine role model for the younger scouts.
One other suggestion is to hold a joint JLT with another scout troop--this helps get a lot of ideas and enthusiasm. We have been doing this format for the last 5 years and it is well received by all. We create our own syllabus and do not use the JLT Training Resources from BSA.
Greg Anthony
Scoutmaster, Troop 19
Nashua, NH
www.troop19.org