Shrinkage?

[EagleSeven]

Exporting from TinkerCad as an stl file and then using ReplicatorG to convert to x3g - not sure if I would notice a 7mm difference.
Should I use that as a basis and then scale all drawings up by that factor?

Why don't you use Makerbot-2.4 slicer and connect computer to printer, thru USB cable ?
(no need to convert to .x3g with that Slicer, and can use .stl files direct to printer)
(Most real slicer software give measurements less than a mm)
I don't consider Rep-G a Real Slicer, and does not have everything Needed !
Much easier that way and with Makerbot or Other Slicer you can check objects overall-size measurements, in all 3 axis, before printing.

We have tried Many different Slicers and the old Makerbot-2.4 is the one that worked Best with our CTC-Bizer,
since it has Original CTC Firmware version !