I posted my Marshmallow mod in the Portable section....I'm reposting them here.
I'm too cheap to buy tips for my Marshmallows, so I modified ear plugs to fit.
The tips starts out as plain ear plugs that I found at Target for about $5
They are hollow on the inside , but closed off at the ends.
You take off top section of the xmas tree.....Just cut that part off with a razor and there is a hole there.
Cut the other side as follows:
These are really comfortable for me... and they isolate pretty well as well.
I just did the Kramer mod as well. Took out the paper and inserted foam ....
Wires shortened with 2.5mm(1/8in) plugs for use with my Treo 700p