the rawhide will not add weight,, just make the back a little more durable,,and it is a good skill to have,, and I think makes the bow less likely to break if there is an inperfection on the back,, it can also be very beautiful when sanded and finished,,
I highly recommend it,, the thinner the better for your project,,,deer hide or thin goat etc,, the recurves should be fine,,
