To improve the image quality and consistancy you can set the default image quality for the software. This has a maximum on 4000px.
If it's consistency you're after then I would set this to the level of the lowest image you are importing in the scribe as it will reduce all other images to that level when they are imported.
With regards Tawe I don't know the answer to this I'm afraid but when our developers have a free moment I am going to get them to check. We've had a similar question on the Tawe forum recently and when I have that answer I will post it there so follow that forum post and you'll get a notification when I have the answer