YGABSM, that means that the project must have been far enough advanced for the type to be about to go into production ????????????? otherwise it would not apear on a plan for refit of a unit.
This is what I found in a quich search:
By the time the factory was occupied by American troops in late April 1945 and all development stopped, the first 20 pre-production aircraft were in a advanced state of construction with various subassemblies being found in the factory, as well as the V-6 a two seater trainer.
http://tanks45.tripod.com/Jets45/His...oIX/Go-229.htm
bregds
SES