I feel both have their place but be careful with fast on where coins are deep and trash is minimal. Dug a 11-12 inch Merc. tonite and real deepies do sound different with just deep on.
Fast on could easily cause you to miss one, however a two headed sword as fast on just might get that medium depth nice coin close to trash...
Fast on could easily cause you to miss one, however a two headed sword as fast on just might get that medium depth nice coin close to trash...