Thanks for the advice. I have also noticed the upscaler still not being “consistent enough” - it can’t hold on to fine details, sometimes even in the close-ups. Still the best I could come up with so far.
I’ve not watched it yet but I have a feeling that seasons 1-3 are going to be harder to upscale than 4-7 because the source videos are lower quality on the 1-3 DVDs. I think they used higher quality tape to edit from season 4 on as there is a noticeable increase of quality from season 4 onwards.