Dropped my fork stuff off at my fab guy's house last night! He's doing the welding and whatnot in trade for my snow tires.
I encourage you to experiment! 700C is on the big side for me even on an upright, but some people can make it work on a bent, so more power to them.
As for the steering, in the model I made some criteria planes representing slightly more than a 30 degree lean angle before the handlebars touch the ground. In reality it will be all what feels right within those constraints, but I doubt I'll have the guts to be leaning that far in anyway- if I'm 30 degrees over I'm probably already crashing! Haha. I'll be cautious and see how it all goes together. Maybe I'll modify it a bit for better angles after it's together.
This guy has a lot higher handlebars than I'm planning for, so maybe it will be uncomfortable to have them so low?