I am making the TFFW Gramercy bow saw with their kit. The drawings show curved tenon shoulders. The explanation from TFFW is that they are curved on their bow saw because "they could" due to automated manufacturing. However, the said for making your own, the curves are not necessary.
I know a number of you have made this saw. What are your thoughts? My main concern is if the mortise and tenon mating surfaces are "square" will there be a tendency to have strain on one side (top or bottom) of the tenon stretcher piece? That is, will there be a visible gap at the joint?
Or, if I have executed to the correct dimensions, the joint will be tight based on blade length?
Many Kind Regards . . . Allen