I've used the 5 x 10 on both an Omega and on my last F 75 LTD and I loved the coil on those two detectors. On both it just seemed those 5 x 10's had a tighter sweet spot and ultimately separated better. The one I currently have seems to have about a 4" diameter sweet shop where one pin points up on its front. Anyway, loads of thanks for all your great testing info and keep them coming. HH jim tn