Just a quick update on custom tips:
Received my custom Tips for the ASG -1. They are very comfortable. Made of silicone. Takes a bit of time to figure out how to place these onto the ASG's as they are a very tight fit, could also be used for other headphones as well i'm sure. They fit extremely comfortably and provide excellent seal. combined with the filters, they really push back the mids. Instrumental separation seems to be improved as well. Comfort wise, they are a significant improvement over other tips I've tried as they don't fall out and provide excellent isolation.
Due to the wide nature of the bore and the silicone material of the tips, I'm a little concerned about how much of a beating these can take.
Adding these tips on will push out the ASGs from being flush against your ear. For me, the entire ASG shell has been pushed out past my ear, with only the cables, the custom tips, and a small area of the lower border resting against my outer ear. Despite this, it is actually very secure and much more comfortable. For those of you who have smaller ears or for which the ASGs don't provide a great fit to your outer ear, this is a very viable and comfortable option. Even for those for whom the ASG fits well, there can be some soreness or fatigue after wearing it for several hours which these have solved.