Never used them and only know about them.
One thing is that they are known to be sensitive for dirt including oil left behind after running.
Look up how to clean them and start with that.
On the perry site there is a reference list that shows the recommended model of carb for the various engines.
If the carb fits make sure to use a new or at least known good "o" ring between the carb and the crankcase.
"false air" leaks are a pain to diagnose so better avoid them.

Regarding the air bleed system carb.
The bleed hole setting is one single fixed setting.
The chance this single setting is both correct for the idle and the mid range is relative small (not impossible though)
Glow fuel has a much wider "range" that is "good enough" for the engine to keep running.
Petrol is more demanding.

Try and see what happens is the simplest way to be sure; you might find something that could be useful for all of us