Cordy, i have A3 graph paper. Admittedly in metric, but it didnt take long at all to make paper templates of the correct number of squares in each dimension. My squares are 25mm rather than inch, but as long as all the lines move through the same arc it will work out fine.
Then a quick freehand copying of the cutting line as it passes through each box and the job is done. About an hour for the paper templates. I have found that computer programmes are fine if youre very good at them, but its much quicker for me to draw with pen and paper than to plot a screen.
Then I pasted the papers onto scrap pieces of chip board and MDF, cut them on the bandsaw and smoothed them off with the bobbin sander to make solid templates ( I just LOVE power tools!). Then I just have to double sided tape them to the wood and use the router table with a bearing bit to make the finished pieces. If I like it and its a success, then I can make more with the same templates.
Got half of them done yesterday and hope to finish the rest today but I might be interrupted later by the boss as we are going away tomorrow for the weekend.
Mark, I do have a spokeshave as my next "to buy" item, but I have not seen any in the shops here and wont have any visitors from the UK now till early june, and shipping price on any small tool will more than double the cost.