TLDR: Try placing a belt heavy blueprint to see if it lags for you.
So I started a new moderately modded game with ~20 mods along with this one. Once I got my first smelter line setup I went to copy paste it and I was lagging like crazy. I started troubleshooting by removing mods, starting a new game and trying to place a blueprint. I noticed it only happened with belt heavy blueprints, a reactor setup didn't lag at all but a simple bus extender lagged a lot. Eventually I made it through the mod list until I uninstalled your mod and the lag disappeared. It was almost the last mod I disabled so I don't think it's a conflict, at least not with another mod. Maybe it just doesn't like my computer :P
Seems like a neat mod, shame it doesn't work for me. Thanks anyway.
