Sunridge Mazda to the rescue

Marc set us up to get a brake checkup at his workplace. One of the
guys there had VW experience (Peter) so he helped us out and was
extremely helpful. Turns out water was getting into the rear right
drum because a rubber plug was missing. He also checked out a few
things for the backfires and suggested we change the spark plug gap
to 0.007 instead of 0.006 . He checked for exhaust leaks and found
none and confirmed our timing was OK. Yay Mazda! So if you live in the
Calgary area or are visiting, don't be scared to go see them. Great
folks.

Big thanks to Mark for setting it all up. We owe you one!