been using the stock 11" coil and the ultimate 13" coil for the past couple months... no matter what program I'm in I know my swing speed is somewhat fast... it's just my style... so recently i once again added the 6x8 SEF coil to my collection... let me tell you... it makes you swing slower.. and you find things you missed with the other coils... good thing is I can crank the sensitivity up to 28-29 in this soil and if you go slow enough it will catch a signal and give up the goods... over the past few months I have covered many football sized feilds... today while using the 6x8 I covered a 100ft x 50ft area in about 3 hours... very slow and precise... I pulled a bunch of targets I missed with both the other coils... can't wait to take it somewhere I know there's silver hidden... maybe tomorrow?

We never quit learning, I agree 100% with your slow swing speed theory.