DrForinor - half a millimetre in fact. 👍😊
Red is 8mm, blue is 8.5mm. See how it goes. If the PF doesn’t lock fully, buy the red one. Personally, having had the Liz for a while now, I can’t see how the 8.5mm would work. You’ll need to squeeze the living day out of it. But do try.
May I ask… were they out of stock on the red 8mm one?