Back to the OP's question, I did a poll back in 2012, which is not very long ago, and asked several questions. I was asking who built a NW vs. TW, whether they liked their choice, and for those that did not, have they converted or would they like to convert. The results were that the fleet is currently 50% NW, 50% TW and if everyone had what they wanted the fleet would be 40% NW and 60% TW. HTH.
Tim
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