I think I found a way to use many different coils other than whats available for the XLT. I was told that the bounty hunters use the same frequency and that there were adapters available so you could use them interchangeably with Whites 6.59khz. If this is so, then why not use the many new coils available to the BH's as well as the Fisher F2-4's? If those adapters are no longer available, it wouldn't be to hard to put a XLT plug on say a Fisher F2 12x10 SEF coil? it wouldn't cost more than $10-$15 to have it done? What do you guys think?