It is surmised that one difference between good direct inhale (DI) and good mouth-to-lung (MTL) setups is the inner diameter (bore) of the drip tip. Large bore = lots of unrestricted flow = better for DI. Smaller bore = less, but more concentrated flow = better for MTL.
If that's so: Then it is possible that many tanks thought to be suitable for only DI might be made suitable for MTL by swapping their large-bore drip tips for smaller bore ones.
Thus the question: Good source(s) for small-bore drip tips?
If that's so: Then it is possible that many tanks thought to be suitable for only DI might be made suitable for MTL by swapping their large-bore drip tips for smaller bore ones.
Thus the question: Good source(s) for small-bore drip tips?