I stopped playing online for a long time, and I recently got back in. I have been playing live poker at least 4 days a week for months tho. I think so much about each specific move that I can bearly 2 table.

to think I used to play speed chess...

I, personally would think that if you're comfortable playing 4 tables @ 50, there's no reason to change anything for 100. I think the whole idea is that you play 10k hands or so at 100, and if you're not winning as much as you think you should, then you look at your stats in PT, figure out the leak, and fix it. This is what I hope to do anyway.