No scrog expert as you know but have links to a ton of info on the subject you might find useful. Working on the best method to make it available but in the interim here are my thoughts (for what they are worth, free advice is worth every penny you paid).
So far I think topping to produce 2 or more main stems before they reach the screen is preferable, it adds a week or so to veg but saves tons of effort training. Shoot for a "T" shape. Train UNDER the screen, much easier (this is painful experience talking). LST does not really apply to scrogs, nothing "low stress" about twisting a stem into a pretzel.

FIM is cooler but I haven't tried it in a scrog (yet).
Seems to be the consensus that 12-18 inch screen height is about right, more room makes it easier to work under but requires a few more days to start the training and fill the screen. Less room=quicker but harder to work, any lower and you don't have enough stems to reasonably fill the screen, mine have 9 each.
No consensus on the pruning, some advocate pruning anything that shades the bud sites, others contend they are the solar panels that fuel your buds. I tend to take a middle of the road approach - prune what you can't manage to move out of the way, bud is king. Consensus is ~1 plant/sqft, your mileage may vary but 2 sqft will take a little longer.
Setup sounds awesome but out of my budget

look forward to envying it.
Hope that helps, I'll subscribe your journal for certain.