Anybody out there used either the "Sink Setter" or "Sink
Undermounter" for mounting undermounted sinks?

Sink Setter: SinkSetter.com
Sink Undermounter:
http://www.vanceind.com/products/sin...s/um/index.htm

Rather than building a wood frame, these cool steel bracket gadgets
supposedly allow you to easily level the sink via leveling screws.
I've been thinking that some advantages of using these a

o one can tighten the leveling screws to force a tight seal
between the sink and the counter top.
o ability to replace the sink in the future due to brackets being
removable
o ability to lower sink in the future to re-seal/caulk the sink in
case sealant fails.

Questions I have a

o does cabinet frame need to be trimed so that mounting bracket
does not stick out too much above (installing 3cm granite)?
o For rectanglular sink (18x30), should I get 2 sets (4 brackets)
or only one set? Vender recommends using 2 sets only for oval sinks.

Thanks in advance

-Pablo.