Peter,
Thanks for the advice and URL for your very informative website. I found the packing tips interesting and useful.
When I first got my 3.0 Sam2, I tried winding the string set on the two handles, but I really found this produced a bit of drama and tangles when I went to unwind. It got to the point that I was spending too much time getting my lines in order and not enough flying. My current solution of using a separate homemade winder seems to work a treat.
I've also found that packing the kite so that it is possible to run the lines and handles out while leaving the kite in the pack is also a better option. I like having my lines clear and pinned down before I open the Sam, especially when the winds are gusting. I field pack basically the reverse: stow the kite and then retrieve the lines and handles. This is similar to the method that I used when I was parachute jumping over 35 years ago (before foils).
Here's a couple of photos with some laminated Qld. Maple winders that I made up. The red bag holds the handles and winder and is packed on top of the kite. This protects the kite fabric from the winder and handles and also keeps the fabric and bridle lines away from those pack zippers (let me tell 'ya, gettin' stuck in a zipper can cause some damage...OUCH!!!) The second winder is just a spare.