Just purchased a used XP Deus. I’ve used a Deus before but never took the time to really learn it. Selling my other detectors so the Deus will be my only detector. Andy’s second book is scheduled to arrive Saturday. So I plan on spending time reading & studying. I purchased this Deus with the 9” LF coil & the HF Elliptical coil. Is there any benefits or what benefits would I get out of upgrading to the new 9” x35 coil?