I'll take a shot at some of these.
1. BRB page 46 top of the page under 'Firing While Falling Back' says units may choose to run when falling back but it must be towards their own table edge.
2. Yes. From the latest Space Marine
FAQ:
Q. When a unit with the And They Shall Know no Fear
special rule regroups do they get to immediately move up
to 3" as well as moving as normal that turn? (p51)
A. Yes.
3. Yes, BRB page 46 says "Troops who are falling back automatically fail all morale checks."
4. Yes, an
IC may assault into a different unit (so long as the rules for multiple combats are followed) because BRB page 49 under 'Independent Characters and Assaults' says that when the unit assaults, the
IC does as well because it is part of the unit. It is only when attacks are
resolved that the
IC is treated as a separate single-model unit.
5. This is from the latest INAT
FAQ:
GEN.01 – Q: Can players convert their models in order
to gain an advantage in the game? For example,
making tiny models to hide behind scenery, longer
barrels on their vehicles to increase the range of their
weapons, using shorter/taller flying bases for their
models then those supplied, etc?
A: Players may only convert their models for aesthetic
purposes. Any players, in the opinion of the Tournament
organizers/judges, who have converted their models
specifically to gain a gameplay advantage, may be penalized
at the whim of the Tournament Organizer. These penalties
can be as little as playing the game acting as if the suspect
model is the proper dimensions, all the way up to immediate
ejection from the tournament [clarification]. When in doubt,
always check with the tournament organizer before
the tournament begins and then discuss the issue again with
each of your opponents before the game starts.
Ref: GEN.04, GEN.05, RB.22A.01
Generally speaking (and looking at the next post) a possible solution if the chimera was modeled with an extra set of tracks is to simply say the extra tracks would be ignored for measuring fire arcs and distance to the hull of the vehicle. But it should have been decided or ruled upon before the tourney.
6. I would like to see the rules KInG is citing that allows a building to deep strike onto a battlefield!