this is probably NOT very pertinent, but i thought i'd share a bit of ' compatibility ' experience i've had when dealing with DVD-RW discs, and their ' cross-compatibility ' between the Philips 357x and Mag 51x machines...
somewhere along the line, funai changed their directory entry structure, vis a vis, the ' empty title ' versus ' empty space ' entry in the DVDs after a recording is burned.
while this is NOT serious, it DOES affect the ability to burn additional titles across the 2 machines.
in essence, a DVD RW disc that is initialized ( owned ) by the Philips unit CAN be added to by a Mag machine without issue. In this case, the Mag machines apparently understand the older Philips directory entry ( empty title ), which is at least partially how the machines know where to begin a new recording.
however, if a disc is initialized on the mag machine, or even added to on a mag machine, the result is that the disc cannot be further processed ( other than to play ) on the philips machine.
after testing, i've found that the MRC option does NOT take care of this issue.
BUT, a ' mag processed RW disc CAN be further processed by the philips by doing a short manual recording ( post mag processing ) in the philips machine, and then erasing it.
this process ' replaces ' the mag generated ' empty space ' entry with the philips ' empty title ' entry, thereby making the disc compatible, once again, with whatever the philips is looking for in order to find a ' next recording ' start point.
i know this is drawn out and has been addressed somewhere before, but i think i dissected the process a bit further in order to understand just what was going on.
perhaps the only incompatibility in the philips process is looking for a specific title entry on the DVD, and it gets confused when it doesn't find something obscure, like the word ' title ' instead of ' space ', whereby the mag simply looks for either of those entries at the end of the last recording or some such thing.
in any case, this helped me, as i frequently record shows on both machines when there is a time or channel conflict, and use the DVDs to transfer the titles between machines.
sorry for the long explanation...
hope this helps some folks with both machines.
oh, by the way, the Panny machines do NOT use the VR+ recoding method...