All was well, if not a day late...
The SG comes out at 1055 this morning with a little over after filling the 30l Young's fermentor to the shoulder.
There were a few pools of juice at the back on the worktop - probably dripped from the top boards, as the tray isn't that much bigger and it all has to be very square for the juice to run down. A 'skirt' would be handy, or a few extra boards to the back and sides to act as guides for any stray juice.
Good thing is that it worked and I got what I wanted from one pressing without having to reload the press! This will now make the whole process a bit quicker.