Yep. Been there, done that, bought the tee shirt.
When I used mine (Vietnam Vet) it was anything on the line for the Commercial. Keep in mind a Complex endorsement is required for commercial. They also had a 300hp Cherokee Six that I ask to be checked out in too.
The ME and INST courses were more restricted. I had to pick a syllabus from two or three different options. I picked the biggest and most expensive.
- All of my instrument was in a complex (Arrow) with 10 hours in ME (Aztec).
- At the same time I was taking my ME training. I passed on the quick courses and picked the ME course with 36 hours of training. We even did some ME cross country training.
I flew the dead leg of a couple ME charters with my ME instructor. Combined with training I had over 50 hours of ME which at the time was the magic number for insurance.