I thought I would resurrect this topic. I've just got the Winwing rudder pedals - and the F-15C is still impossible to control via the rudders on take-off and landing. I really don't think this is a nosewheel-steering manifestation ie when and if you have it engaged or not.
In external view sit behind the F-15 and see what happens when the keyboard commands Z and X are tapped. There is a minor deflection of the rudder in the required direction and the rudder re-centres therefore making minor corrections are possible.
Now, when the rudder is set as an axis to the rudder pedal, push a pedal and watch. The rudder moves hard-over to its full travel and stays there; when the rudder pedals are recentred, the rudder moves to full travel in the opposite direction. There is no re-centering of the rudder and this uncontrollable swinging begins because there is no way to centralise the rudder via the pedals.
Whatever coding has been used with the keyboard commands Z and X to enable minimal rudder movement and centering needs to applied to the rudder axis.
Solution Found
The answer lay in calibration of the rudder pedals via Windows.
Go to Control Panel>Devices & Printers>scroll down all the way to More Devices and Printer Settings. On that page right click your rudder pedals (mine is labelled under a graphic for an X Box controller!), select Game controller settings, select your pedals and select properties>settings>calibrate. After calibration ensure that the Z rotation axis is only shaded to half way as shown on the Test page. Originally, mine had the entire bar shaded.
Now look at your F-15 and you'll see the rudders move in proportion to your rudder pedal input and centre themselves when pressure is released from the rudder pedal.
As far as the toe brakes are concerned, I got them to work perfectly by applying 'invert' in the DCS axis facility. On the Windows page as mentioned above the X and Y axes show no shading in the bar.