Yes, and for the sake of completeness, I finally moved to the slightly higher capacitance 'Red' plugs, which are rated at 250pF, after having reduced the overall capacitance present by swapping the wired Y-adaptors for brass splitters, shown on the thread concerned - these:

https://www.ebay.co.uk/itm/Gold-Plat...72.m2749.l2649

...which further improved the sound, but necessitated the need for the use of the higher capacitance 'Red' plugs, as mentioned. That combination was the best sounding and the one I eventually settled on. However, I should stress that this stuff is very much system-dependent and not in any way definitive, so as ever use your ears and suck it and see!

Marco.