The biggest file I had to work with was a STEP file of a John Deere engine package that was 650MB. It was a very detailed drawing which even included internals like pistons, cams, bolts, bearings and gaskets. In order to use it in a drawing, I had to eliminate those internal details, which brought it down to and 350MB. My finished drawing was about 450MB.
TC 21 Deluxe, TC 20 Platinum, TC 2015 Platinum, TC 2016 Platinum, TC 2017 Platinum
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