things needed....
-time and the want to not spend money
-pot and extra lid
-tape measure
-cabient scribe
-drill corded would be best
-sharpie
-assorted drill bits - i used 3/32 for the mojarity
-sander to removed burs
-jig saw
-grinder to trim lid after jig saw if needed
-hand full of SS nuts and bolts for elevating the false bottom
lets beging...............
pot that needs false bottom
lid drilled and screwed on center, note: holes are big enough for drywall screw
use scribe to mark area to be cut off
jig saw. Note: hold jig saw steady and move line towards the blade so you can worry about the line.
then test fit and mark areas that need to be trimmed with sharpie and use grinder to trim, move lid and hold grinder steady. repeat till satified
now use the scribe to create lines around a 1/4 inch apart or hold pencil steady and move lid
now mark out your intersecting lines. yeah i got lazy you could use a straight edge
drill, then sand top to remove burs and grind then sand bottom to remove burs, i also had to use a drill bit to clean out the holes after sanding
almost completed just needs the SS nuts and bolts installed to support it off the bottom of the pot and some tweeking with a vise grip to bend the edge tighter to the outside of the pot.
Note if you use a non-dished lid try to be spot on when trimming lid
Not my best work but if you took more time drilling and marking out the holes you could have a perfect false bottom for less then $20
-time and the want to not spend money
-pot and extra lid
-tape measure
-cabient scribe
-drill corded would be best
-sharpie
-assorted drill bits - i used 3/32 for the mojarity
-sander to removed burs
-jig saw
-grinder to trim lid after jig saw if needed
-hand full of SS nuts and bolts for elevating the false bottom
lets beging...............

pot that needs false bottom

lid drilled and screwed on center, note: holes are big enough for drywall screw

use scribe to mark area to be cut off

jig saw. Note: hold jig saw steady and move line towards the blade so you can worry about the line.
then test fit and mark areas that need to be trimmed with sharpie and use grinder to trim, move lid and hold grinder steady. repeat till satified

now use the scribe to create lines around a 1/4 inch apart or hold pencil steady and move lid

now mark out your intersecting lines. yeah i got lazy you could use a straight edge

drill, then sand top to remove burs and grind then sand bottom to remove burs, i also had to use a drill bit to clean out the holes after sanding

almost completed just needs the SS nuts and bolts installed to support it off the bottom of the pot and some tweeking with a vise grip to bend the edge tighter to the outside of the pot.
Note if you use a non-dished lid try to be spot on when trimming lid
Not my best work but if you took more time drilling and marking out the holes you could have a perfect false bottom for less then $20