I am one of the 2 mentioned by bulldog i really liked the one length concept but i lost all of my touch around the greens with the longer wedges. It didn't take me too long to switch back.
From my personal experience i would say a two length system would work better maybe wedges down to a 9 iron would be a gap or pitching wedge length and then 8 iron to 4 or 5 iron should be 6 iron length. A one length split set would work well.
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