Jeff,
I did not select a font when I ordered mine. You DO need to select the manufacturer logo. That's how they get there additional $30.00. I talked to Seadek on the phone, I had the same question. They told me I did need to select a font when ordering from the selections listed under the Moomba logos. You just need to confirm the dimensions of your platform. I'm getting ready to try mine out for the first time tomorrow.
Hope this helps. Let me know if you have any other questions that I can help with. Seadek was very helpful on the phone.