Here's a vid of the RCBS in action. Note that the spindle is just chucked in a drill, so this is the least expensive Trim Pro version. It needs a 1/2" drill though.
https://www.youtube.com/watch?v=j65zHxVenz8
He's using the three way cutter too.
As for case gauges, I'd suggest you also look at the JP Rifles gauge. Most gauges only tell you length and shoulder position. The JP will also measure the diameter of the case after sizing, which is hugely useful.
http://www.jprifles.com/1.5.1.2_maint.php
https://www.youtube.com/watch?v=j65zHxVenz8
He's using the three way cutter too.
As for case gauges, I'd suggest you also look at the JP Rifles gauge. Most gauges only tell you length and shoulder position. The JP will also measure the diameter of the case after sizing, which is hugely useful.
http://www.jprifles.com/1.5.1.2_maint.php