A few more questions if you don’t mind.
Did you use a 470k trimmer or a 500k?
Did you use a 200pf or 220pf for the 200pf position?
SKU A-3208
https://www.taydaelectronics.com/c-250k-ohm-anti-log-taper-potentiometer-round-shaft-pcb-mount-l.html
This the correct c250k pot?
And finally...