Hi Guys! My first post!

Looking to buy my first 4x5 soon (probably will be a Toyo 45a), and have mostly figured it all out apart from which filter system I can use.
I'll be using some sort of 90mm lens, so presumably screw-in filters will risk vignetting?
I'll need to use and ND and an orange/red simultaneously, so will some sort of square filter system be the best to look at?
Hitech make this system, which looks like the right sort of thing - anyone used it?

Sorry if this question has been asked before, but I did do a search for it and came up with nothing specific.

Thanks!

Alex