did minelab add a 14 incher to their commander line of coils?anyhow,no coils made for these machines are as tough and reliable as the commander coils.the solid surfaces make recovering targets easier,as you can dump handfulls of your hole spoils directly on them for a quicker target id.and the big heavy commander coils go through grass better.but heavy they are,thus the popular coiltek goldstalker series.coiltek still makes the solid 14 inch round coils,inn dd pro,mono,or anti interference versions.my 14x9 elliptical goldstalker stayed on my gpx for over a year.have found bits as small as.02 gram with it, and is light enough to forgo the use of a bungee or hipstick.i keep the upgraded bungee wrapped on the shaft,because you never know,on a long hunt it would help conserve energy.the popular aftermarket coils are mainly just much lighter.regardless of the coils weight,it has to be placed over gold to find any.any round coiltek 14 incher,or the commander 15x12e,will find gold at good depths.the ellipticals are much more sensitive to small shallow gold,while the round mono coils go deeper,at the expense of some sensitivity to smaller targets.in the end,use what your confident with,only a positive mindset will keep you digging all those holes.for a good info site,check out golddetecting4umer,there are threads for the differrent coil brands,is an ozzy minelab site,tons of info on this stuff.good luck