Agreed - If you cut the legs on a d2c wii, the drive would stop working!
Are you super-sure you have a D2C and not a D2B with cut legs? Only D2B drives were ever cut.
To answer your question -
*D2Ckey + Clip is cheap and requires no soldering to your wii - but won't work if you have a D2C2 - if your wii is more than a few months old, it won't be a D2C2.
*Wasabi + Clip requires one point to be soldered to the wii.
*D2Pro + Clip works with some wiis without any points soldered to the wii - but sometimes needs one wire to be manually soldered (the same one wasabi needs).
Current versions of both D2Pro and Wasabi work with D2C2.
Personally, I don't like clips much. If you don't trust your soldering skills, get a professional to do a wired install for you.