Next weekend! Sounds like you've got a busy week
I got a couple of these cable kits from Venhill, one for my throttle and one for my choke (because I have changed both the throttle and the choke and about to do the carbs)
I don't have my mikunis yet, but these kits look like they'll do the job very well. 48mm stroke in the splitter- a bit light and plasticy compared to the bmw splitters, but I suppose it will work just fine.
Aside from all your jetting stuff, you may need to look into the stroke needs of your carbs and what your bmw splitter and throttle can actually provide. Airhead Wrangler helped me out pointing this out with a post of his somewhere a while back.
No point upgrading to mikunis if you can't open right em up