Hi, I was wondering whether the Sentinel Snorkel has to have the end cap loosened for heavier amounts of writing, kind of how you might on a TWSBI Vac or Pilot 823. The reason I ask is that after about of page of writing using the Sentinel, it seems to die on me. I haven't tried loosening it after a heavy writing session lately as it's not in rotation at the moment. I recently had the pen repaired by indy-pen-dance so it should be in good shape snorkel-wise. My guess is the answer is "no" but I'd be happy to be proven wrong on this one for sure.