Hello Dave, you would be correct. Springs on Spanish locks do have simpler geometry than standard flintlock springs. Since its the heel of the cock that acts upon it, it doesn't need a hook to engage the tumbler, which is a part not present on the majority of miquelet locks.
One of my questions would be how would you clean the scale off the inside of the bend? Or is it even necessary to do so? Machining is my forte, I have never engaged in blacksmithing, which it seems some amount of it will be necessary in order for me to be really serious about lock making.