You do need a correct size tamper with the classic and I can confirm a 58mm one is a little too small. I’ve never replaced it with a 58.357 or whatever it is though. You can actually get pretty good results with the small plastic one if you carefully tamp round and round. It’s not difficult.
Two mods I’ve done. Rancilio Silvia steam wand is a must for milk and it’s an easy swap. I’ve also reduced the pressure in mine to ~10 Bar using the OPV.
You do need a correct size tamper with the classic and I can confirm a 58mm one is a little too small. I’ve never replaced it with a 58.357 or whatever it is though. You can actually get pretty good results with the small plastic one if you carefully tamp round and round. It’s not difficult.
Two mods I’ve done. Rancilio Silvia steam wand is a must for milk and it’s an easy swap. I’ve also reduced the pressure in mine to ~10 Bar using the OPV.