Well most work is done at the tablesaw so it only makes sense that it should be your primary focus when it comes to making specialized jigs and such for cutting puzzle piecess....one of the most important considerations is vibration. Eliminating any possibility of excess vibration will greatly improve your cuts.
One of the first things to reduce vibration is replacing the standard pulley belt to a 'Link' belt available just about anywhere. This modification alone will drastically improve the saw cut.
Changing the cast pulleys to machined versions will also help improve vibration issues.
Saw blade stiffeners are also widely available and should be a must have, on any tablesaw, I've always wondered why they don't come with new saws.
These are some of the most important things, if you think of anything else to add please do....
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