re:  fixing the troubled spots in the Wasserboxer is cheaper than
switching to other trouble spots

It's also good to remember that VW still makes and sells the Vanagon
(in South Africa) and they appear to have fixed Wasserboxer problems
by no longer installing Wasserboxers.  This conversion stuff fits with
that nicely.

Clearly YMMV as regards these engines, but this aircooled owner loves
to keep pointing out that the Wasserboxer is the only engine to have
ever blown up during a Road&Track magazine long-term test (sometime
prior to 36K miles) and just "listening" to the traffic on this list
suggests the mileage is usually on the problematic side.  Someday I'll
get organized to get a newer Vanagon and it will have an inline engine
if I do.