So I had intended to do a complete playthrough of the Port and ST:R, but I ran into some sort of mission conflict bug that must be due to a problem on my end. Instead I just created a custom mission with just command briefing stages and tested them out 10 at a time. The only issue I noticed was that the Prometheus animation lacks the grid background. As for the animation speed, they all seem normal by my reckoning.
Feel free to PM about the mission conflict bug if you are unable to solve it.
So Mjn.Mixael, could you please make the following changes to the APNGs?
1) Use the grey grid background in 2_cb_prometheus
2) Use GTW UD-1 Volz
for the caption in 2_cb_volz (instead of the VLL-9 caption)