The Captain wrote: Sitting deep, pulling like a truck
viewtopic.php?f=197&t=2392205 Pulley lines have shrunk causing a loss of depower. Measure out AB depower point , it needs to be 25cm(standard)or maybe more to account for upper B bridle shrink, 26-27 is a good guess, too long and you'll get front collapses more easy when fully depowered.
The Captain wrote:I am now running B +1cm, C +2cm
This creates a higher camber which is WORSE for upwind, but gives the kite more lift or pull. It will however improve the depower limiting by your shrunk pulley lines. You need a slight reflex or negative camber for best upwind, so shorten B and C. You could set to b-1 c-2 etc but that would limit the depower even more. Either compensate for adjusting B less with more adjustment in a ZMOD( you read the first link right?), or after you have set the mixer to correct for shrunken pulley lines with a ZMOD move the C pulley line down to the ELC to effectively lengthen Z. Alternately you could move the ZMOD knot or make another knot, but I doubt you'll have room. Doing this all will also alter the trim of your kite to be more powered so you need to pull the trimmer or shorten the front leader. It does this because one making a knot in the rear main shortens it but 2 if you move the pulley attachment down it powers more or up depowers more, both for the same line trim.
If with a reflex profile you lack the umpf to get going or do jumps, you can try using a WAC(hard soft) line or setting the mixer to be a bit less reflex. An alternate to camber the whole wing is just to camber the rear more by delaying C engaging by setting it more loose in the mixer but keeping B the same. This has the benefit of being more stable and high lift.
I think it's all a bit complicated because the FS mixer lacks all of the adjustments to correct for everything and FS themselves band around that this and that isn't needed and the mixer should always be adjusted in a certain way like B for 1 and C for 2 etc, which none of it is correct.