No.
Even the 3W solution is not a cure-all.
The MVVS 58 has a carb cover with added nipple. Too many customers have no idea what this is for, and get confused. There seems to be no way to do things right for all.
If I were to build an engine, it would be bare to the bone, but equipped with a nipple to save the customer the hassle of soldering one on. Then I would HINT at what that nipple is meant for.