If it seems like I'm spreading my questions over various new threads...I am! Figured they stand alone and might help those following.   Haven't fitted a sink with a pedestal ever, always drop in ones, so here come the questions:   Sink is loosely in:     Mounted on M10 bzp studs with those plastic cam things to adjust the height. 10mm tile drill followed by a 7mm multi construction bit. Studs sent home with the impact, going nowhere! Rather than use the s