Experience with k&k ULTRA pure western?

Hi!

Does anybody make use of the k&k pure western with the Ultra Pure preamp? I have some questions about it:

Is it still possible to make use of a feedback-buster?

Can I adjust the volume without a screwdriver?

Does the pickup itself still work even if there´s no battery energy for the preamp?

IS IT A GOOD PREAMP? I know that there is no preamp necessary because the pickup itself is quite powerful. Does the preamp change the signal in any negative or positive way?

Thanks,
Thorsten

Hello again!

What I NEED to know is if you can still use a feedback-buster with the preamp installed in the soundhole.

I have already put this question in about 6 or 8 different forums on the internet but did not get any answer yet.

Here you can find a picture of the preamp installed on a guitar:

http://www.kksound.com/ultrapurewestern.html

I can not go for a new guitar until I have an answer on my question, so I was very pleased if somebody could help me...

Thanks,
Thorsten