Master bath part 2

Finally got back around to this project. Have redone it a little, wondering if this is acceptable?


Main questions are:
1. Anything jumping out as stupid or wrong?
2. Is the venting correct in my diagram?
2. Do I need to do a separate vent to the left of the vertical run for the opposing wall sink?
3. Can I use a 90 Degree 3" turn with a 2" inlet for a toilet (Or should I 3x2x3 WYE between the 90 and the stack)?
4. Am I allowed to use a 3" to 4" rubber adapter to tie PVC to ABS for the top of my vent before it exits through my roof?

design

You CANNOT use a "T" for the toilet, and a "heel inlet elbow" is a T. Either redesign it or use a 3" combo with a bushing in the end. What is that "useless" vent next to the lavatory for? You also CANNOT use a "double Y" or "double tee/cross" for the two sinks.

hj nailed this nail with a hammer. Might want to redesign it a little bit, but it's a great idea none the less!