Hope you get your machine running better than what it has been,Tesoro like most detector manufactures build the machine to a specif tolerance and as long as all the machine fall within that tolerance then it will be signed off ready to ship out,of course some machine just come inside the lower end and some machines are nudging the top of the tolerance range and those are of course the 'hot' machines.But the trouble is that until you buy one and try it out the customer has no idea what is a 'hot' or a 'cold' machine.
I have a UK version of the Vaquero called the Trident11 Extreme,this has not only got manual GB but also fixed GB as well which is set for ferrite about as bad as what it gets,as we have mild ground conditions most of the time i can run mine is fixed GB,but when ground conditions are bad or i would change coils then manual GB is the way forward,but the fixed GB does work most of the time which is a suprise,which means one less setting that i require to adjust before i am out detecting.
I have a UK version of the Vaquero called the Trident11 Extreme,this has not only got manual GB but also fixed GB as well which is set for ferrite about as bad as what it gets,as we have mild ground conditions most of the time i can run mine is fixed GB,but when ground conditions are bad or i would change coils then manual GB is the way forward,but the fixed GB does work most of the time which is a suprise,which means one less setting that i require to adjust before i am out detecting.