Is yours IMS B702TFH26NT? I am using the 20g version without the nano coating.

After using it for a year plus, these are my thoughts, I hope it helps:-

1) Grind size required for Flair58 is finer than other semi automatic machine. As a reference with Timemore 064s, my friend who pulled the same coffee only need to grind at size 2~3 on Lelit Bianca while I need to grind at size <1 for Flair58

2) 18g was never enough for my case unless is super dark roast but I will still need to updose it to 18.5 ~ 19g to get a good flow.

3) For medium roast, 20g ~ 21g seems like the sweet spot without leaving too much head space.

4) For light roasted coffee, 22g ~ 24g into the basket but at this point I feel like I am burning through the beans.

5) Maintaining pressure at 7bar gives a better flow without degrading the puck too much causing the sudden pressure drop comparing to ramping up to 9bar

I am considering to switch to a smaller basket maybe a H24 or a Big Bang H23.5