On Nov 14, 8:45 am, Todd Rich wrote:
...
4. Is there a better option I missed that falls within my $200 budget?
Todd

Have you tried a hand-held angle grinder? If the metal is reflecting a
distant light source you can see and correct the waviness quite
easily. I read that prior to surface grinders, a skilled knife grinder
could grind flat by hand within about 1/64". I can usually grind a
weld close enough to clean up with an 0.025 milling cut.