Hi,
I am coming back on this subject, as last weekend I taped the show. You can find the result here:
http://www.dimeadozen.org/torrents-details.php?id=439613Attached a crappy picture that will give you an idea about the PA and it's distance from my spot.
With all tips from here in mind, my initial plan was to record the supportact in XY and decide afterwards (between support and main act) if I would leave it or change it. I followed Acidjack's advice to stick with the Milabs>R44 combi (instead of Milabs>Mixpre-D>M10). Very glad I did so!
The -12db switch on the Milabs was ON this time... very wise as the music was loud!
When I arrived at the spot it turned out XY was not possible with the 'creation' I had made. The balcony-floor has a slight edge that was a bit higher than expected. OK, plan B, A-B 20cm apart. Tape it firm and forget about it. Done.
Recording turns out much better that the previous time I was there. I am pleased with it. Anyway, judge for yourself. There are some samples included on Dime.
Thanks to everyone for the advice!