Andy, great bow! Everyone perceives smooth draw differently. Sounds like you may prefer smooth in the begining of the draw and adding taper will give you that perception. It will tend to make it stack earlier nearing the end of the draw though, but that may not be a concern for you. Typically, less taper adds preload which implies more speed. So likewise adding taper may rob some speed and can make it picky with arrows particularly heavier ones.
Generally, if you add taper you may want to stiffen the tips. If you go with .004 and the tip wedges it seems like a good combo for performance. There are several 50's style recurves with that combo and they shoot great. It may get noodly at the tips and hard to fine tune if you don't have stiff enough tips with .004 on a recurve. It depends on how hard the curve is and you will surely need a parabolic width taper. If it gets too weak in the tips you can always add a belly overlay of glass and fade it out as it passes the curve into the working section of the limb. Tip weight means little if the curve opens too soon. Weak tip curves wobble badly when the string slams home.