Hmm, that's news to me. Good to know, though. Don't really see the need (one can easily trim, but can't add unless they rebuild) other than to appease people.
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I guess the end product would depend on the vender. I have had problems with a big vender that sells the Nova so I got in contact with a Chinese supplier. I was informed that the Nova now is shipped with short wicks but long wicked head can still be purchased. I was assuming this was a manufacturer change. Makes no difference to me how they are shipped though . But I think the short works better.