RaisedByWolves
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Tx
That brake failure is a bummer. It's good that it happened when it did and not when you really needed the brakes, as scary as it was. Was that an actual Scott master cylinder or a Chinese pot metal copy? I know it's a lot of work, but you could make one. I made one out of solid aluminum.
Amphibs do require a lot of dependable braking capabilities. The smaller the wheels, the greater the pressures required since the small diameter disk has less mechanical advantage. You have 5" wheels which are the worse. I suggest you add another brake disk to the other side of the wheel along with the appropriate wheel braking unit. Plumb the two sides together with a "T" in the brake line. I did this to a set of EDO amphibs which had 5" wheels. It made all the difference. Raisedbywolves has these floats now.
Also your nose strut needing air could contribute to the steering issues as the angle of the pivot can make turning difficult. It wants to keep going straight.
Make sure you secure the line really well. Had a landing at home on the grass and the zip ties broke, wrapping the hose around the wheel. That side locked up. I had a wtf moment followed by locking the other side. Now there is a stainless steel zip tie and a couple plastic ones. Good thing it was on grass. The brakes work really well. Keep the nose wheel grease new and clean, the nose wheels work better that way
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