Well, I just figured out how the new Double Play feature in 354 actually works ....
1) The buffer re-sets itself at the start of each show. ( Not sure if I like that ... )
2) The buffer length reflects the length of the show. That explains why I've seen half-hour buffers, one hour buffers, two hour buffers and up to three hour buffers ... Hmmmm.
???
I just checked on a HR23-700, both tuners with DP active had a 90 minute buffer. Tuner 1 had tonights NASCAR race, time bar showed from 6:30 to 10:30 but the buffer would go back only 90 minutes.
On tuner 2 I could go back 90 minutes which covered 4 30 minute shows with the 1st show in the list going back only as far as the 90 minutes buffer would allow.