Hi,
Fellow train simmer Noah Woods brought a bug on the CR, PRR and CBQ SD7/9 engines to my attention, all of those units were missing their dynamic brake controls in the engine blueprints.
A small patch file (RWP format) for the bugged engines is now available on their respective download pages.
Burlington: http://golden-age-rails.com/packsrw/emdsd9cbq.html
Conrail: http://golden-age-rails.com/packsrw/emdsd7cr.html
Pennsy: http://golden-age-rails.com/packsrw/emdsd7prr.html
Sorry about the bug!
Michael