The Xcal is a dive machine im not sure what they would change just because ML feels with the introduction of the CTX its got shallow water hunting covered. Mods such as the PP mod, connectors, and many headphones have a depth limit. The Xcal was ML answer to compete with the Fisher CZ. NONE of the companies have changed their dive machine to much. ML does have the ability to change over to FBS which could happen since the Xcal now is the only machine they have using BBS. I dont seem them making a change unless another company comes out with a competitive machine for salt water. Ml no longer makes the Sov, so i think we are lucky that there were a lot of after market companies who still produces coils and such we can use on the Xcal. With FBS now having the chip in the coil....... this could be a pricy up grade for us.
Dew