Not an audiophile but wanted to share my experience.
Just had full custom ear molds created at Widex in Hk, for about usd 75. I was originally using the soft single flange tips, with a pretty good fit. First impressions of the cutom molds are not favorable. Although the bass is definitely deeper, I find the bass to be disjointed from the mid and highs. Bass also lacks the subtleties and warmth of before sounding thud-like. Overall, the vocals transformed from warm and immediate to studio like... Bit too clinical for my taste. Maybe it's the fit of the customs or the harder material, but I feel there is less resonance. Bass tends to be more pronounced and overwhelming in an unbalanced fashion. Going back to the soft tips, immediately noticed how musical and well balanced the range of sounds are, and prepared to give up a bit of bass for that overall magical feel.
Anyone else have experience on customs? Thinking of maybe cutting the molds to make them into tips only, not full custom molds.