from what I understand, it is on their list.
but also from what I understand it is a long process per plane type. and many planes may not be upgradeable.. all the research that goes into upgrading a plane, must be horendus. someone said once about upgrading a P-51D. I said to what as far as I know the P-51D is a upgrade from the P-51B. and the D was it during WWII if P51d was up graded during WWII not enough was used for historical usage, like the P-51D. logging off tired starting to blab