Since no one had made a Master Spool for Inland brand filament this was the easiest one to scale to fit that brand's rolls. First I scaled the whole thing down to 92% so it would snuggly fit the inner diameter. Then I scaled the Z axis to 135% to make it wide enough for the roll. Although I think 133% might be a bit better. But overall it's a great little design that's minimal on material and easy to use.
For Inland spools first scale down to 90% then scale Z to 133%