Resizable radar, resizes properly (had to change backward x coords), starts at the standard size.
I moved the radar inside the resizers, since i figured it would be annoying to accidentally hit one trying to click something.

And yes, resizing does increase your maximum viewing distances.
You can also make it long thin shapes if you mainly want to see in the x or y direction. In screenshots below, Sol was the selected object, 1k distance away in both cases.

One thing I don't see immediately how to do is get rid of the cross-hair to replace it with something else. Also, the crosshair isnt static, it seems to take approximately half the distance in either direction, no matter how you resize the radar, so i would definitely like to get rid of it in favor of range finding circles like im working on.