Making a custom IEM with silicone ear plugs

[XacTactX]

http://www.howtogeek.com/57481/how-to-make-custom-silicone-ear-molds-for-your-in-ear-monitors/
 
This guy used silicone ear plugs and made a mold of his ear, then he stuck his IEMs in it and cut a hole. I'm going to do the same thing, so I have some Monoprice MEP-933 on the way. But I have a question. Looks at this picture:
 
http://www.howtogeek.com/wp-content/uploads/2011/03/cut-18.jpg
 
You notice how he cut a hole, and the hole is the same width as the driver. Is that the right way to make the hole, or is there a better way?
 
Oh, boy, it's going to sound great when it's done.

 

[XacTactX]

In other words should I make the sound hole like the first one or the second one?
 
1.) http://guide-images.makeprojects.org/igi/qtdqSQtdwGSCjGuQ.medium
 
2.) http://www.howtogeek.com/wp-content/uploads/2011/03/cut-18.jpg
 
Thank you.

 

[XacTactX]

I got the Radians DIY custom earplugs in the mail today from Amazon. I mixed together equal parts of the two materials but it plain doesn't harden. I mixed it about 4 hours ago, and it still doesn't stay in a ball, it turns into a puddle. Mind you the instructions say it will take 10 min. maybe 20 min. tops. So I have the material mixed for 10 times as long as it says. The one I got is clearly defective, so I just ordered another one and it will probably arrive on Friday. I'll let you guys know how this turns out. And also, I got the Radians earplugs (repackaged from Amazon) for $6.61.

I love being a cheapass.
 
TLDR: Earplugs don't work, getting some more on Friday, will update you then.

 

[what?]

http://www.head-fi.org/t/600708/more-on-diy-custom-iem-moulds

 

[antberg]

nice one Xac,nice one thread indeed!!!
hope i can read your impression (not the silicone one!!) soon!
is the first time i saw some cheap idea for custom derivation,probably i am going to make some experiment for myself too,i hope.i just need somebody to send me some mold from the US,i doubt i can find something similar here!!
good luck
Salute