Bought a 901 mod from ken, and was quite pleased, did have a minor issue with the connector breaking free, and he resolved it quickly.
I live one state away, so I was back in business on a Tuesday, and my initial unit developed the issue on Saturday. Cannot beat that level of customer service, match it yes, beat it no.
Almost forgot to mention my initial order shipped the next day and arrived the following day or 2 days via 1st class mail.
I recommend his box mods to anyone considering one.