Ok so, I have removed the overscan that has been prominent in super resolutions.
Added x-axis centering, repossion your screen if the core or your CRT is off position.
Added new dynamic super widths. This uses a pixel clock algorythm to create a resolution that is closer to native than normal super resolutions.
Check out the video.
This has not all been merge yet. Just waiting on the last few changes.
As usually you can get it from my Git or use my auto install script for Linux.