Digiscoping with a DSLR (1 Viewer)

Hi
I currently own a kowa tsn-3 and a nikon d50 dslr and came across something called a photo attachment TSN-PA2 and a camera mount TSN-CM2 in their catelogue. I need help with several things...

1. is there a website where i can find out more about this?
2. how much would this cost?
3. Would vignetting be a problem?
4. does anyone know a website with a guide to digiscoping with a dslr and an example of the photographs that can be achieved?

I have been digiscoping with my ordinary compact for a while now and i am getting annoyed by its limitations and i thought using my dslr would be a good way around this.

Thanks in advance for any help.

Steve,
You can see some results of using a DSLR at http://www.flickr.com/groups/digiscopers/
The Nikon info is at http://nikon.topica.ne.jp/bi_e/products/nature_c.htm
and you can check out B and H for the pricing http://www.bhphotovideo.com/
I hope this helps, Neil.

cheers for the info its very useful, i can see you get some good quality shots with it so i reckon its the way forward.

check a few threads down and look at the one on the same subject,, considerable info there to help guide ya along,,

pro and con on either way,, personally I do both and like them both,,