RE: Removing the rear heater
Jamie, it's a practical matter.  If you don't normally have passengers in
the rear, that is travel solo or with only someone in the passenger seat up
front, then you free up quite a bit of storage space under the rear seat by
removing the heater.  It's s simle task to remove and easily replaced later
if needed.  And practically speaking you get more room than it appears
because it leaves room to sore longer items like folding chairs, roll up
tables, etc.