Filament Guide for Lack Table

I'm in the process of creating an enclosure for my prusa i3 mk2 and I've gone the lack table way that seem to be popular. I've been looking at all the different filament guides, they seem to be mostly small holes or long narrow holes. Both make sense.

I'm going to be bringing my internal height of the enclosure up to 18" with the addition of printed parts that double for holding the acrylic sides in place. I've been told that the small hole would be a detriment to taller prints so the long h