If you record directly to DVD-R in SP mode (Panasonic E85), the recorder allows 2 hours worth of material to fit. The machine then treats the disc as 'full'. However, I've never yet seen a 2 hour recording in SP mode exceed more than around 4GB and its often less, both on my old E60 and on the E85. That means there's about 10% unused space, which equates to about 10 minutes of SP quality material. However, if you record 2 hours 9 minutes to the HDD in SP mode, you''ll find you can high speed dub all of it to a DVD-R no problem. So I reckon if you need to record something around 2hours 9 minutes long, don't use FR mode. Use SP mode via the HDD, and it will still fit on a DVD-R. Don't know if anyone does this already, but if not it could be useful tip.