Will lasers make wigglers obsolete? There’s a case to be made that you can set up your mill faster and with less fuss with a tool like the pictured laser edge/center finder. Move the laser beam to the edge of the workpiece and zero your scale. You can just as easily locate the mill over scribed lines or center-punch divots by aligning the laser dot over them.
The finder is accurate to 0.001″ and the dot size is adjustable with a polarizing attachment. The finder uses SR44 batteries that last for over three hours of continuous operation; of course you’ll probably only turn on the finder for short sessions, so the batteries should last a while.
The laser edge/center finder is available with 1/4″, 3/8″, 1/2″, 6 mm, and 10 mm shanks to fit in commonly-sized collets and mill holders, or you can chuck it into a drill press or lathe to aligning operations on these machines too. The down side is it’ll run you $85.