The fact that it is yet another aircraft unable to lower the gear once down on the water to taxi out on a ramp and that apparently nobody bothered to test its handling on the water or on the ground is simply amazing.
The typical amphibious floats have free castering front wheels…so they are either steered with differntial braking…doesn’t or barely works with the XCub or with the rudder…also barely works with the X-cub.
Most likely a contact point issue…in the old sims a steering angle >90° was all you nneded to make a free castering wheel…it couldn’t be this simple here 
In previous Sims the default planes were actually helpful explaining certain portions of the files such as the contact points in the C-172 in FS9 and FSx:
//0 Class
//1 Longitudinal Position (feet)
//2 Lateral Position (feet)
//3 Vertical Position (feet)
//4 Impact Damage Threshold (Feet Per Minute)
//5 Brake Map (0=None, 1=Left, 2=Right)
//6 Wheel Radius (feet)
//7 Steer Angle (degrees)
//8 Static Compression (feet) (0 if rigid)
//9 Max/Static Compression Ratio
//10 Damping Ratio (0=Undamped, 1=Critically Damped)
//11 Extension Time (seconds)
//12 Retraction Time (seconds)
//13 Sound Type
[contact_points]
point.0 = 1, 0.90, 0.00, -4.09, 1500, 0, 0.5, 22.0, 0.25,2.5, 0.7, 0.0, 0.0, 0
point.1 = 1, -4.70, -4.50, -4.01, 3500, 1, 0.5, 0.0, 0.3, 2.5, 0.7, 0.0, 0.0, 2
point.2 = 1, -4.70, 4.50, -4.01, 3500, 2, 0.5, 0.0, 0.3, 2.5, 0.7, 0.0, 0.0, 3
point.3 = 2, -3.90, -18.0, 3.00, 1800, 0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 5
point.4 = 2, -3.90 18.0, 3.00, 1800, 0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 6
point.5= 2,-20.23, 0.0, 0.30, 1800, 0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 9
point.6= 2, 1.48, 0.0, -2.17, 1800, 0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 4
Does something like this exist for MSFS ??
Using the C172 G1000 Float contact points I now have the Xcub behave on the ground and better in the water…I was even able to lower the gear and taxi out…just have to keep it slow to avoid a crash.
point.0 = 1, 4.4, -3.5, -6.8, 750, 0, 0.5, 15, 0.424, 1.5, 0.75, 8, 8, 0, 0, 0, 4
point.1 = 1, 4.4, 3.5, -6.8, 750, 0, 0.5, 15, 0.424, 1.5, 0.75, 8, 8, 0, 0, 0, 4
point.2 = 1, -4.9, -3.5, -7.05, 1500, 1, 0.5, 0, 0.132, 2, 0.75, 11, 11, 2, 0, 0, 4
point.3 = 1, -4.9, 3.5, -7.05, 1500, 2, 0.5, 0, 0.132, 2, 0.75, 11, 11, 3, 0, 0, 4
point.4 = 4, 3, -3.29, -5.65, 1500, 0, 0, 0, 0.3, 2.5, 0.39, 0, 0, 4, 0, 0, 1
point.5 = 4, 3, 3.28, -5.65, 1500, 0, 0, 0, 0.3, 2.5, 0.39, 0, 0, 4, 0, 0, 1
point.6 = 4, -9.467188, -3.55, -4.95, 1500, 0, 0, 0.3, 2.5, 0.39, 0, 0, 4, 0, 0, 1
point.7 = 4, -9.467188, 3.55, -4.95, 1500, 0, 0, 0, 0.3, 2.5, 0.39, 0, 0, 4, 0, 0, 1
point.8 = 5, -11.546, -3.55, -5.3, 2200, 0, 0.75, 60, 0.237, 4, 0.8, 1, 2, 2, 0, 0, 1
point.9 = 5, -11.546, 3.55, -5.3, 2200, 0, 0.75, 60, 0.237, 4, 0.8, 1, 2, 2, 0, 0, 1
point.10 = 17, 4.2, 0, 0.9, 1, 0, 0, 0, 0, 0, 0, 0, 0, 7, 0, 0
point.11 = 2, -3.9, -17, 2, 350, 0, 0, 0, 0, 0, 0, 0, 0, 5, 0, 0
point.12 = 2, -3.9, 17, 2, 350, 0, 0, 0, 0, 0, 0, 0, 0, 6, 0, 0
point.13 = 2, -18.2, 0, -0.3, 720, 0, 0, 0, 0, 0, 0, 0, 0, 9, 0, 0
point.14 = 2, -22, 0, 5.3, 350, 0, 0, 0, 0, 0, 0, 0, 0, 4, 0, 0
point.15= 2, 4.390305, -3.49685, -4.181302, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
point.16= 2, 4.390305, 3.49685, -4.181301, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
point.17= 2, -0.526055, -3.500003, -5.370309, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
point.18= 2, -0.526055, 3.500003, -5.370309, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
point.19= 2, -10.207049, -3.499701, -4.113675, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
point.20= 2, -10.207049, 3.499701, -4.113675, 500, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1
Only problem is that with these CPs the right side wheel animations are not correct. On the ground they are up.