The Blank version of the model is “Disc Golf mini centered” to put your own text on it, open the Fusion file i have then make a text box like this, that is against the edges and that uses grid lines for the Horizontal lines

 Then for the Text Box Choose the Settings make sure you choose

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The Depth for the letter i do is .025

I recommend changing the infill pattern since it is slightly see through, with a pattern it will look cooler

Also When doing a 3 number Disc Golf Mini the Most Visible pleasing Height is 1.25in