Hi, Newbie questions, kit/moding kit questions,

[Railrider1920]

Hi Folks,
Made a post in general already. Dannyp suggested that this area for questions about moding knives.

I'd like to get a knife kit or two to put together to try to learn how its done. Eventually I may want to modify them, maybe make them spring assist, if possible. Doing this leading up to hopefully making my own knives one day.

I was looking at a few from knifekits.com Three I am looking at are:
Fl007:http://www.knifekits.com/vcom/product_info.php?cPath=1_32&products_id=11
FLX25:http://www.knifekits.com/vcom/product_info.php?products_id=860
DDR-3BL: http://www.knifekits.com/vcom/product_info.php?cPath=1_13&products_id=20
(If links are not allowed, I apologize, I didn't see that in the guidlines)

Does anyone have any experience with these kits? Are they a decent place to start? Can they be moded to make them spring assit? Would you suggest starting with a different kit?

Does anyone make a spring assisted kit?

That pretty much is it. Might also want to do some file work on the blades if possible. If anyone has any suggestions or opinions, I'd like to hear them.
Thanks,
Rob