QUOTE
Ok so the 80 ribbon is basically a shielded version. If i were to connect the data lines via fine coax cable, with their shielding connected to ground, that would give the same effect right?
As for the 40 vs 80, you can't just ground the 40 wire some way. The purpose of the 80 isn't just grounding, it also is for physical separation and isolation. But it is all really moot since you will be using a CF adapter plugged directly into the MB. Not sure why you would want to go to the trouble of soldering directly, but I am sure you have your reasons. I have done it two ways, buy a male ide/cf adapter and plug directly to the onboard adapter, and I have also used a female cf/ide adapter with a trimmed down stubby ide cable, which allowed me to get the CF into a Slim mod I made (as the male adapter standing straight up was too tall to fit the slim mod. Obvioulsly, this method would allow the use of an 80wire cable... hint hint...
And as for the noticeable speed difference between a 40/80, well i can't say as I can see a difference, but I am not normally the person that sees that stuff. (I don't see fluorescent lights flicker, I can't see rainbow effects on DLP TV,s, etc. etc...) But there are people that say it is technically faster and I am not saying that it isn't, I am just saying that I cant see it.
-PTF