RE: Hypersonic 125 & Uphaul
I am 80 kg and have excellent skills. In freshwater, 105 liters is about smallest I can go without having the board sink (water over the deck). If I place my feet correctly, the deck stays pretty dry. The board is somewhat unstable for uphauling, but it's not too difficult with PRACTICE.
I use this board when I want to be sure that I can get home in winds too light to water start (less than 10 knots).
A 125 liter board will easily float you, but as Roger & Ian say - you have to get your feet / weight centered properly to uphaul. A few centimeters off and some part of the board is going to start sinking, making it more difficult to keep your balance. Wave action will also play a role too. More waves = more difficult to keep your balance.
Practice your water starts. When you get it figured out, it is sooo much easier than up hauling - if there is enough wind.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.