Best Add-ons for precision modeling?

[smws (S Sittler)]

I think Construction Lines is what you want:

Construction Lines - Accurate Cad Modelling Add-On For Blender

the developer is very active here on this forum:

Construction Lines add-on - CAD - Released

This is an add-on I’ve built called Construction Lines, for accurate modeling with a CAD-like workflow (though can be using in any modeling). Building models from 2D primitives, setting out geometry with guide points and guidelines, is very easy. I’ve been using it for my own projects for a while now and am planning to release in the coming weeks so I wanted to see what kind of interest in the community there is for this type of tool. I’ve added a couple of videos below to show some of the feat…