I've been reading about the OPV mod, and I think it's something I'd like to tackle on my Gaggia Classic. The issue I have is that the standard way to measure the pressure seems to be to unscrew the double spout from the portafilter, and attach a threaded pressure gauge. My portafilter seems to have the double spouts built into it though - not sure if I have a non-standard portafilter?
Just wondered what peoples suggestions were for my best alternatives for measuring the pressure would be? Options I'm considering :
- Buy a bottomless portafilter, and a basket with an attached pressure gauge (had been considering getting a bottomless portafilter anyway - so two birds with one stone
- Get a permanent pressure gauge to fit into case - I think I could then use it to measure the pressure for OPV modding with a blind basket fitted. How useful is the pressure gauge other than the one time OPV modding? Would consider tackling this as a project if it's something which would be useful to have on the machine..
Are there any cheaper/easier options I'm overlooking?
Thanks for any help..