Regarding the size. I also noticed it was basically identical to the XP elliptical. But the XP elliptical is 9.5? x 5? (not 9x5, though the round XP HF coil is 9? in diameter). So yeah, CoilTek is ?rounding up? by calling it a 10? coil. Used it at the beach and the depth was just as impressive as what you saw in your test garden. High sensitivity to micro targets too, as expected.
BTW, I normally run with Iron Bias F2 at the default setting of 6 and it mitigates square nail falsing well with minimal non-ferrous masking. Suggest folks really take advantage of that F2 Iron Bias filter to mitigate ferrous falsing without fear of masking. It is implemented much better than the Fe IB filter, which I did run at 0. On the beach, I really throw caution to the wind and run F2 IB up to the max at 9, really makes crown caps irrelevant. Cleans them up into a practically pure ferrous signal with a slight non-ferrous burp tone off the coil edge. Folks, don?t fear Iron Bias F2. Use it to your advantage. Minimal chance of non-ferrous target masking, therefore practically nil downside to using it.
HTH