Looks to have had a good impact. My only suggestion would be to maybe have used some black nylon cord to tie it down instead of the cable ties. It would fit through the grooves on the sink and as long as you can do up the knots on the pcie slot end so it is not visible, I reckon you'd be able to get enough pressure on the sink. Did you thread the cable ties without removing the backplate first by threading through a gap, or did you take it off first to get the ties where they need to be, then re-assemble?