COOKSTER,NO FLAME,BUT HOW HEAVY CAN YOU GO W/ ISOLATION MOVEMENTS.IN MY OPINION,THE MOVEMENTS YOU ARE PRESENTLY DOING,WILL NOT BREAK THE 16" MARK.ADD SOME BB CURLS,INC DB CURLS,SKULLCRUSHERS,CLOSE GRIP BENCH PRESS,OH TRICEPS EXT'S.WITH THESE EXERCISES YOU CAN MAXIMIZE OVERLOAD.STAY WITHIN THE 6-8 REP RANGE AND ALWAYS INCLUDE 8 SETS FOR BICEPS AND 8-10 SETS FOR TRICEPS.KEEP WORKING THEM AND WATCH THOSE SUCKERS GROW.