I am really new to CBG building but I have designed and built many things in my life.  Thought I would share this method of marking and cutting frets that I came up with (apologies if this method is already known and used).

Using the Stew-Mac calculator for data, I lay out the finger board using Microsoft Visio (any drawing program that allows you to enter numerical data will work).  

The next step is to print this out one-to-one on a laser printer.  The heat sensitive toner is important.

Cut out the guide and tape it printed side down on your finger board.

Press the paper with a dry iron set to the Cotton setting.  This will transfer some of the toner to the wood.

For cutting the frets I have found a small hobby miter box most useful (won't work for really wide finger boards).

I have cut four finger boards using this method, the last two with the miter box and that tool made cut the time in half.

I have attached a PDF file with four Uke fret layouts.