I just whipped up a 25mm ruler so you can easily measure if the boat is in compliance with Class Rule 5.7.3 "[...] the
forward edge of the mast is not less than 25 mm aft of the forward vertical face of the molded step in the sole liner"

[Linked Image from i.imgur.com]

Here's a link to my Google Drive with a zip file of the STL, STEP, and SOLIDWORKs files.

https://drive.google.com/file/d/1QwK4XwWZrOmN4DzqT27LTyVcLcAw3aVw/view?usp=sharing