Manufacturers, brands, skins, maintenance, stands, sticks, michrophones and other accessories for congueros can be discussed into this forum ...... leave your experience or express your doubts!
Until recently the rawhide head on my quinto was uniformly deep in color, and translucent. After tightening it way, way up, it is mostly opaque and light-yellow.
Have you seen this happen when you had the drum tuned where you think it should be (rather than tuned way too high)?