It’s much better if we can see the exact wording and checkboxes on the officer’s sworn statement plus the ticket, and the way you do that is to upload digital photos or scans (with your personal id and citation number redacted) to any free image hosting site and link them here in your thread.
Based on information you have provided so far I’d be inclined to suggest that you arrive a little early and ask the prosecutor if he/she can amend to the Kitsap County ordinance 46.02.050 Inattentive driving, which is local and will not go on your state record (clerk is correct on that). It carries a fine of $138 which is less than a deferred finding.
I would definitely NOT write a letter to the judge and prosecutor. As to your argument about speed points, perhaps others can comment but I sort of doubt that will work.
You will get the most help if you can post your discovery materials. There might be a possibility for a preliminary motion to suppress the radar but we need to see the discovery firsthand.

