Quote: As for the orange base my scanner seems to filter it out just fine automatically
Sure - but it means you're restricted to "automatic white balance" which isn't always the effect you require.
The jiggery pokery involved in filtering out the minus orange cast (don't forget there is a negative to positive inversion as well) seems to complicate correcting the colour compared with scanning colour transparencies.
Must admit I haven't tried the Rollei film, I probably won't as I use little colour negative stock these days.