Ok. I know one thing well now: Espresso satisfies something that I am not 
getting from drip. Same beans but no bueno.

I replaced the 3 plungers and now all is well with the world. I had to dial 
the opv way back so now reads a perfect and steady 9.5 bar and the shots 
are coming up aces.

I had quite a time sourcing the kit. Several places out of stock, one place 
ordered for me, then found the most important plunger was not available, 
would be another week.

Finally I called a place back, desperate, wanted to buy whatever kit they 
had for sale. He found that the exact kit I needed was at a local store 10 
minutes from my house, said they had 4 in stock. I'd called that store back 
on the 13th of april. Went there in person and the guy said they didn't 
have it. Fortunately I availed on him to look more and he found it, a 
little baggy of precious brass plungers for $62 + tax.

Install was trivial and shots now perfect.

So, the real conclusion: if you have trouble with brew pressure, and the 
opv adjustment isn't working, disassemble the big hex nuts on top and 
bottom of group head and see how your plungers look. Mine were horrible. 
After an hour boiling in caffiza it was clear there was not much bushing 
left to seal with. Replacement is about a 2 minute job.

Thanks guys for diagnosing this, I'm back in business.


On Friday, April 13, 2018 at 10:00:19 AM UTC-7, bmacpiper wrote:

> Yeah, not sure. I’ve only ever been able to source the entire kit, i.e. 
> spring and brass bits with seals attached already. I’d check the usual 
> suspects, i.e. WLL, Chris’, Seattle Espresso Gear, 1st Line. 
>
> best, 
> bmc 
>
> > On Apr 13, 2018, at 09:43, Eric Christoffersen <[email protected] 
> <javascript:>> wrote: 
> > 
> > 
> > 
> > 
> > Good idea to do the top seal too. 
> > 
> > The brew lever seal I’ve done a few times, it’s good. 
> > 
> > Wondering if there’s silicone gaskets I could use instead of more rubber 
> that hardens. Best thing I ever did was get a silicone brew screen seal. 
> > 
> > 
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