I also found the cutting chart to be pretty close, and I made a number of small cuts on my 1486 until I achieved the best results. And as  stated above, I aimed for the lowest SWR at the transmit frequency. I found the uncut Tram 1486 to be resonant around 420 mHz out of the package, so it needs to be cut for the appropriate frequency. I would also like to offer an observation about the Tram 1486. I had run a Comet CA-712EFC antenna, which is 10’ tall, on my repeater for the past couple of