I was aware of two Transgo kits for the 4L60E, the HD-2 and FSK, and saw another, the "SK", mentioned in another thread. Can anyone summarize the functional differences between these kits? There's not a whole lot of informtaion to be found on Transgo's web site.

I have the PSK, the one with the video. It has not been installed yet, as I'm still gathering the other parts to beef up my 4L60E. Should I get the HD-2 and dump my PSK on eBay?