Probably everyone else here knows this, but can I just share that my experience with current make free wheels has been unimpressive.
Even the Shimano 7-speed I bought a couple of years ago started to feel funny (that’s a technical term) while under moderate pedal power after only a thousand miles or so. I’m back to using a Sachs freewheel that is still working well.
I’d be interested to hear experiences with the newer IRD freewheels. It looks like they are trying to make freewheels of a higher quality at least than the current Shimano/Sunrace stuff.
Otto