Hi BA,
Well the CPs aren't too bad. Pic 1 show on the runway and perfect, Pic 2 shows on soft ground, no too bad.
Right a contact tweak is what you want!
Look at Pic 3, this is the Contact Points section of the D520 'aircraft.cfg' file. The underlined in red sections represent the tail wheel and then left and then right main wheel contact points.
These are what need to be altered.
Look at Pic 4, this diagram shows how you need to think about + or -. To get the wheels higher ie away from the ground (so they don't 'sink') they need to have a higher minus - figure or vica versa.
Now have a play with those figures. Backup the cfg file. Then when you have adjusted those figures, save the cfg file and re-load CFS2. Have a look and see what difference you have made. Keep making
SMALL adjustments until happy.
A hint to get you started, -0.90 for the tail wheel and -5.85 for the two main wheels.......
See what you can do
Cheers Shessi