Final follow up on the state of my Sylvia post DIY servicing:
In general the machine is absolutely running better. My biggest complaint previously was a commonly recurring inconsistency in shot timing and yield,
At this point, I can say that performance in this area has improved significantly. While I do see a few inconsistencies, they are more to the tune of what I experienced running a Linea in a commercial setting than what I was previously experiencing on my home machine.
I find that I still need to run a Blank Flush prior to pulling shots; this seems to help the first shot pull more in line with expected parameters. I can only guess then that there is still something amiss in the greater system. Yet after that blank flush, the inconsistency is within a gram or two and 3-4 sec, rather than being off by 6g or some such and 8-10 sec.
My shot times and yield are almost back to my preferred parameter of 14g in 30 sec. If anything, the adjustments to the system are leaning towards a better experience of getting 12g in 32 sec.
Regardless, I can pull 3 shots in a row, now, which are almost identical in time and yield; something I could not say before servicing the machine.
I still find the most interesting aspect of this was that prior to changing my shower screen, these issues were less noticeable. Once that shower screen changed, the "tolerance" issues in the overall system were much more visible and profound.
I will likely still look at taking the Solenoid out and cleaning it sometime around the holidays when I will have a bit more free time. Dunno if that will result in any further changes, but it would be nice to figure out why running a Blank Flush prior to pulling my first shot improves consistency.
Cheers, all!