I wonder if the same problem will arise with NTSC, too...
One thing: few days ago I was joking with laserdisc and external comb filters (inside DVD recorders) and I noted that passing through one of them, the phase was inverted - so, the phase inversion trick could work... but sadly, as they are spatially not aligned, and the comb filters between LD player and DVD recorded threat the signals in a quite different manner, it's impossible to use them to work... hope to find out an external hardware "piece" that could do somehow the phase inversion, as this will be the optimal solution... IMHO... thanks to AntcuFaalb, now I cannot think of anything else! (-^,)