One challenge that will arise from this is ensuring that components in existing estimates remain at the same cost that they were bid at. I assume that the estimate is a SQL database? There could be...

The other side to this is we need to have that "box" not always tied to 0°, 45°, 90°, etc. There are multiple times where items are skewed i.e. dumpster pads, parking stalls, etc.

What about also adding the ability to have another viewport (multiple would be ideal) on the same sheet, that has different scales than the overall sheet? This comes into play with "enlarged" plan ...

It also works as the "stop" key, and that would be nice to have.