So here are my impression of the Lambskin fenestrated pads "Aliexpress pads" with my heKse.
These might be the cure for the treble harshness !!
I am not saying these are absolutely necessary, but it does change the sound a little, at least enough for me to notice it immediately. These do tame the treble peaks that i found a little annoying. In certain tracks, it is too harsh. These pads tame the highs just enough while maintaining the crispness that the hekse is known for. in the mids, the vocals are fuller with more depth to it. As a result, the low end is brought up a little making it sound more towards neutral.
Here are the cons. Being made from lambskin, it does take away some of the soundstage away, however, imaging is still intact. Some of the air is also missing but that personally doesnt bother me since my dac (Yggy) is on the bright side anyways.
Overall i think these pads were a steal for $40. It doesnt come with a adapter with tabs, just a oval adhesive strip attached to it. So reapplying can be a issue if you want A/B between stock and this pad. However, the stock pads can be applied and taken off easily.
I think peeps who own the hekse should consider getting this pad. If you have $40 to spare, get it. It might give your hp a new type of sound.