As far as I know there has never been a school on doing upgrades. Everyone, including those who now do work for others, had to start doing them on their own. Its the only way to learn. Admittedly, a brass engine will present a few extra challenges beyond what a die cast engine, in particular a Lionel diecast engine would have presented, its just a matter of taking your time and asking questions if there is any doubt.
Consider also its would be hard to destroy an engine doing this and many brass engines can be had for less than the labor charge for doing an upgrade. Not much to loose here other than your time.
Pete.
