Roguerat on Feb 28, 2015February 28th, 2015, 9:18 am EST
There were quite a few threads and posts on this subject some years back, just click on Fly Fishing Gear and sort through the history.
I've been furling my own leaders for a while now and personally prefer them to mono types; no curlicues, they lay out flat on a cast and they're limp as all-get-out to let the leader and tippet straighten out with less drag. Google the topic and you'll get a lot of sites and a lot of information, formulas for lengths and tapers, etc. to play with.
Shorter leaders around 7-9' with built-in indicators work well for nymphs and I've furled some 12-14' ones with proportionate tapers for dry flies on smooth water. It just takes the required setup on the furling board (and sometimes a longer board, mine is able to furl leaders up to 16').
Roguerat on Mar 1, 2015March 1st, 2015, 3:22 am EST
I use these 4 as the basis for leaders, favoring the Coats and Gutermann: Berkley XL 2# test, UNI-Mono Clear Monofilament in fine and medium, Coats Transparent in 'smoke' color, and Gutermann Invisible Thread also in smoke. I draw the finished leader through a block of softened beeswax as floatant, never have any problems keeping them on top.
I also use a 'tippet base' of 3X on the end of a furled leader, this gets sacrificed bit-by-bit as I change tippet..saves the end of the leader from being nibbled away.
For a nymphing leader I use Berkley ICE Line fluorocarbon in 1# test, roughly equivalent to 6X material. I'm getting away from in-line indicators and using Lightning Strike 'football' indicators more lately, in the smallest available.
Outdoors198 on Mar 1, 2015March 1st, 2015, 10:25 am EST
I built a jig last night and made my first thread furled leader using 6/0 uni thread. I'm quite thrilled with the ease of it and the fun. It turns over so easily just using my hand I can't wait to see it in action. I used these directions: http://www.hatchesmagazine.com/page/may2006/185