Hi Nikko,
I have a V.4 Silvia and can confirm that not only was the OPV opening @ 10bar but the threads weren't sealed with a liquid thread sealer. I believe vibration caused it to tighten (I could move the nut easily with two fingers!). Pressure varied wildly with less than a quarter turn.
I used my pressure gauge PF and dropped three drops of Loxeal 15-36 and set the OPV to release at about 8+ bar.
Result? Way better. Using VST 18g ridgeless basket and a dorky but highly effective The Great Leveller tamp.
I have a V.4 Silvia and can confirm that not only was the OPV opening @ 10bar but the threads weren't sealed with a liquid thread sealer. I believe vibration caused it to tighten (I could move the nut easily with two fingers!). Pressure varied wildly with less than a quarter turn.
I used my pressure gauge PF and dropped three drops of Loxeal 15-36 and set the OPV to release at about 8+ bar.
Result? Way better. Using VST 18g ridgeless basket and a dorky but highly effective The Great Leveller tamp.

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