A set of Precision Drawing Tools, displayed in the N Panel under its own tab, to assist with precise modelling in Blender.
This set includes options to place the cursor and other features, by Absolute, Delta and Direction inputs, along with other options including Normal & Convergence Intersection and Percentage between selected features.
There is a Pivot Point toolset to provide an alternative location for geometry manipulation, this is displayed optionally as a 3-Axis graphic in the 3D View.
There is also a primitive Parts Library section, still in its infancy, that will be developed over time into a capable repository for standard parts to be used frequently in modelling projects, for example sets of gears, or windows for architecture, etc.
This is my first attempt at a Blender Add-on so I am open to advice and guidance, not only on the design of the code, but also in the procedures for getting an Add-on accepted. I have also opened a GitHub project for this Add-0n here:
And my website below, contains much more information and help facilities, I know I have to do more work here, but this is going to take time.
Zip file below, I hope I have put this in the right place!