I wonder why Minelab has not made any software upgrades for the last 3 years for the CTX? Is it really that difficult or time consuming for them? Why wouldn't they want to satisfy their costumers? There has been so many threads about upgrades and request from the customers. I for one would love to have the volume louder for underwater usage and I know that I am not the only one. I have read many other request for upgrades, some valid and some are just changing the bells and whistles but if customers are getting frustrated and selling their units or going to other brands, why wouldn't Minelab do something about it?