Hmmm, the 5m Duotone wing shows a boom length range of 165 to 169 right on the wing (I think?). I always assumed that would be 115 (+ 50) to 115 (+54). You're saying you go from +54 to +58. Maybe I'm not interpreting the numbers correctly but it seems like you're going from pretty flat (higher wind speed) to really flat.
I've never set mine beyond +55, but I also prefer to downsize to my 4m as soon as the gusts are pushing ~24 kts. The 4m feels so much more nimble than the 5, and I always prefer it if the conditions are right
Not to change the subject, but how are you liking the Moses 1100? Any idea of speed range? I'm assuming it's a pretty low profile wing (thin versus thick). Still waiting for the 1100's to arrive in the US , along with the 82cm masts. Seems we are last on the international distribution priority list for Moses. I use the Moses 633/483 combo for kite foiling and have a 790 for winging, which I haven't tried yet.
Short vid of using my 5m in winds gusting to ~21 kts and setting at +55 (Blue Planet 5'8" Carver board and Gong XL pro wing). I'm not that good yet, and the 5m is definitely a bit of a lumbering beast to swing over your head during tacks....