Reppo WP GP20

I'm trying to find out if Reppo ever issued any fixes for the Western Pacific GP20? I noticed that the brake cylinder animations are backwards (cylinders are out when brakes are released). Also, I don't seem to have any transition sounds between notches. To me it seems to cut out between throttle notches. Wasn't sure if these were addressed. I did a forum search and only found stuff about cabviews, horns and the dynamic brake sound.

