Hi Bobby. I liked the GM3 and the GM4 as well.
Over here in Oz I would back the 70 against both of them no probs.
I have found a lot of gold with the 70 on ground I had absolutely smashed with the GM3 and the 4. Even the GMT. One place was where the 70 got the altitude jitters too and it still found gold the others didnt detect. I reckon the 70 can be run harder in hot ground once you get to know it than the other two.
In quiet ground who knows? I remeber areas where the 3 the 4 and the GMT had to be wound back to just 1/4 of their punch whereas the 70 only needed to be taken back a bit less than 1/3, say 22 on the sensitivity to run smooth.
I dont doubt though that there are areas in other parts of the world where a GM3 would still be a great machine so really I cant knock it.
For me over here though the 70 whoops it.
Over here in Oz I would back the 70 against both of them no probs.
I have found a lot of gold with the 70 on ground I had absolutely smashed with the GM3 and the 4. Even the GMT. One place was where the 70 got the altitude jitters too and it still found gold the others didnt detect. I reckon the 70 can be run harder in hot ground once you get to know it than the other two.
In quiet ground who knows? I remeber areas where the 3 the 4 and the GMT had to be wound back to just 1/4 of their punch whereas the 70 only needed to be taken back a bit less than 1/3, say 22 on the sensitivity to run smooth.
I dont doubt though that there are areas in other parts of the world where a GM3 would still be a great machine so really I cant knock it.
For me over here though the 70 whoops it.