Hi Matt, that's great that you can work with files that V3 couldn't handle!

> but now i notice the number in top left of my window viewport shows 3d -611. What does
> the 611 mean? i noticed one small models this number was around the 5 mark . .

The number up there is the amount of time in milliseconds it took for the last screen draw in that viewport. That will be up there for a while so it will be a little easier to measure display performance as more work is done in that area.

You could probably speed up that heavy model redraw by modifying some settings before you open the file, try going to Options > View and set "Mesh angle" at the top to a rougher angle like 25 degrees and uncheck "Add detail to inflections". That will make for a bit rougher looking shaded surface display but should also increase performance. With smaller files if you want them to look nicer on screen you can set it back to the default Mesh angle = 10 degrees.

- Michael