There appear to be thinly drawn grids in each cell to help alignment?

You can a get cheap portable light table. I have a Huion one I use for making papercraft greeting cards (I sketch the shapes before transferring to colored paper via tracing).

I have to say though, the ability to paint a separate background and foreground and choose the frame rate in the template already is pretty cool!

You could print on Vellum, its slightly transparent and great for transferring. I think thats what they used back in the day too