need some help with this question, please. The 2001 version of the Eldorado operates at 10 Khz and has a 3 3/4 turn ground balance. It was touted as a " bad ground" machine.....relic and prospecting too. The Cortes runs at the same 10 Khz frequency and also has a 3 3/4 turn ground balance. Is it basically an Eldorado plus target id meter??? Would the all metal performance of both units be the same.......and if the answer is yes....... then is the disc performance the same as well? Only diff is the meter..................anyone want to bolster my theory or fill it with holes....be my guest but convince me with facts, thanks.