Matt,

so with Lycs and Contis
lasting 2,000 hours fairly routinely,

If only! They mostly don't, as we all know. Think midtime top overhauls.
Think crankshaft ADs.

the Thielert needs to at least
double that ... unless the replacement cost is equivalent to an overhaul
of a Lyc or Conti.

It's in the same ballpark with 2400 TBR.

--
Thomas Borchert (EDDH)