I am fairly new to BFL, and have the following question.

When I do my weight workouts, most of the time I am using Nautilis equipment.  My question/challenges focuses on the last 2 sets of 12 reps per exercise (your 9 & 10 level sets).  The examples show going to a different exercise for the same muscle group for that.   Since I have to change machines, is it better to do the 6 REP set, and then immediately do the 12 set rep at a slightly lower weight level, vs. resting after 6 reps for 60 seconds and then doing 12 reps (lower weight same machine) and then going to a complimentary machine (for the ones that exist) and doing 12 reps (with some time gap between the sets while changing machines).

Thanks for your help,