Ok if I counted correctly, they are currently using 9 transponders for national hd. By National HD I mean channels like HBO HD, Discovery HD, the VOOM HD channels, Universal HD, ESPN and ESPN2 HD etc, I did not count any networks (ABC, etc) which are on conus transponders which are HD.
Ok so only 9 transponders for the national HD channels.
So on 118.7 they have 24 transponders, with todays national HD channels they still have 15 more transponders which they can use for more HD or for LIL or internationals.
By moving the 9 transponders to 118.7 and if the got rid of the duplicated HD channels on 61.5, 110, 129 and 148 that would open up 19 transponders which could be used for other things.
On 129 they are using 6 transponders for national hd
on 61.5 they are using 6 transponders for national hd
on 110 they are using 3 transponders for national hd
on 148 they are using 4 transponders for national hd
This is why moving ALL national HD to 118.7 makes sense.
Thats my opinion on it anyways