So with the recipe scaling mod you get around the tick limit of crafts per second which is fantastic with your larger machines mod.
However the higher level labs have the issue where even with inserter stack sizes of 255 [max] they are constantly stalling due to the lag between the recipe ending and the machine making a call for more resources.
Idea:
Is it possible to set one "craft" of a labs process cost say 1000x more packs but yield 1000x more "points" towards the science you are researching?
Right now using level 4/5/6 labs even with no speed beacons seems useless as they seem to stall and wait on new pack deliveries constantly. If the requirement was much larger, recipe took longer and result was much larger then that second delay suddenly becomes a tiny % time cost VS how many packs/points are being generated.
Cheers!