I don't see anything to indicate that it wouldn't be legal to stick
with the metric instruments as long as it meets the type certificate
requirements, which it seems to. I will install a second TSO'd feet
altimeter since charts and everything in the states is in feet, but I
don't see why I'd have to change anything else. I know of at least one
YAK airplane that has retained all of its original instruments except
for a new feet altimeter and a transponder. If anyone has any other
experiences let me know.

Adam