Being also a D700 shooter, some hints:
- RL deconvolution usually works very well for D700 raw files
- if you go past diffraction limit, you can raise the RL
Radius
even more without getting artifacts. e.g. try 0.85 for your F9 shots or even larger values for F11 - Dual demosaicers help to avoid sharpening artifacts in flat (oof) regions
Edit: see also My sharpening workflow for base ISO mages with the new features in RT (aka extreme pixel peeping)