I didnt tell you to switch! I told you to keep them both!

You have found a great pile of gold with the 70, paid it off, and you will find a big heap of it with the Pro!
They are truly Brothers from different Mothers...they make one heck of a team! The pair makes a fellow better with both rigs and I'm not kidding!....aside from all this, for what you do and where you are at, and what you hunt, (gold/silver jewelry and coins, beach and water) the Pro is the right tool for that job, and what I exclusively use it for!

Pro zero, 40 disc, iron audio off, 3 clicks down from top sens...thats the ticket for beach and water gold! ..never once have ground balanced either..dont know why, generally I start in the dark, so I mash the power on button, push the disc button and count to "10", and swing away...the sens settings and iron off are stored in the Pros memory, but for some reason, a guy has to set the disc upon power up...I dont think I've ever touched any of the other buttons besides power on, and disc...never once pinpointed either....('course, we are talking sand, so its not really necessary)..one thing that IS necessary is a good scoop..
Full disclosure: (I am a poor example to pattern regarding settings and machine set up knowledge and all that..I just turn the thing on and go). Pro hits freshwater gold hard and deep, you will soon see..this is gonna be a great year!

Mud.