There's a time and place for both,...most bowlers that compete for a living have gone to mid-lane/arc drillings,...control and consistancy topping the list.
Skid/flip is fine for a few games, but on most conditions the dry backends usually required for this reaction soon go away, and the dreaded wet/dry rears it's ugly head. Skid/flip to me is a risk reward,..mid-lane/arc is money...jim
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je