Thanks for the great mod! I always wanted to have this one!
Unfortunately in late game I saw some problems with it.
Problem example:
When I copy-paste some turrets in my outpost, which does have roboport but isn't connected to 'main' network, it downgrades walls to lower tiers. In fact this outpost network is totally empty - have no items except bullets.
Ideas / Solutions:
1. Add a toggle on/off button for the whole mod.
2. A way to select target items - era dialog (to pick up which belts or which machines) or a combinator (that is built in middle of base) or upgrade planner - some way to specify what level is currently really wanted. A nice dialog for era picking can be 'stolen' from here https://mods.factorio.com/mod/quick-mall?from=search - its on screenshot...