Hey guys this has been on my mind for a while so thought I'd post it here, I have a stone resin 1600x900mm shower tray and it weighs a considerable amount so was wondering the best method of moving it into position.   The tray is a tight fit with walls on 3 sides (1 long and 2 short) so I have to be clever about it. The manufacturer informs to lay the tray onto acetic silicone so no cement base involved, the floor is 18mm ply  with extra noggins between joists for extra support, the pl