Very nice idea, and definetly a big improvement from default.
However it fails to archive the 30 second rule ( making manual adjustment necessary even with the mod ).. since it doesn't take into account:
1) the assembler speed
2) any modules attached.

If you could fix these, so it would work as intended - it would be a huge time saver!

Originally this mod was just a 0.13 (now 0.14 too) port of an old 0.12 abandoned mod that I uploaded here by popular request. I'll create a github repo in the future. Mod portal doesn't notify me when people post messages here. I have to intentionally come looking for them.

Also, this mod modifies the Requester Multiplier of a recipe directly which can /only/ be done when Factorio is first starting up. It is probably possible to do what you want as, I believe, there is an mod event for pasting settings. I can give it a shot.