Reletivly simple, level gnomish, build your items that are all cooldown based.
Drop engineering
Relevel and take goblin the second time. I have only done it on 1 of my engineers as of yet(the rest have too much time and $$$ in to recipes). If you do this from the start and avoid learning the expensive goodins it can be done eazaly. Unfortuanly Ogrekarl, I know you have invested a lot of energy in to fillign out your book, doing this will reset all your learned recipies and require you to get them all again. Thats why it works better when it is the plan from the start. I would never do it with one of the higher level toons i have becaus i would loose precious stuff. for example i dont do much raiding on my lock theese days, droping eng would mean loosing Biznicks 247x128 Accurascope plans, and heck i had them though the time that they were removed from the game(what about 6 months this bugger didnt drop?).