Cura - STL Exporter - Architectural Scale Values Question

Attempting to properly scale a 3D model to certain architectural scales (1/4", 1/8", 1/16") and so far the only way I have been able to get it close to size is by using the STL Exporter > Units to mm > export, then, once it is in Cura, it comes out as a giant structure that is way too big to fit on the printing bed. After converting, the closest I have gotten (value wise) to getting them close to scale is:

1/4" = 2.08% Scale

1/8" = 1.04% Scale

1/16" = 0.52% Scale

These values are still off about 3" to scale (aka if I want a 40’ model to scale, it would come out 40’ 3"), so if anyone can shine some light on an easier/better way of getting them true to scale or the exact values it would be much appreciated. Thank you!

I haven’t personally tried to use it because I don’t have a need to work in inches but there is a plug in for Cura called Barbarian that allows for conversion between inches and milimeters. You can access if through the plugins drop down menu at the top left of Cura 2.6.69.