To summarize a couple of other issues with the RockSim model:
- The effect of the bottom nozzle on base drag is unclear.
- The sims are not giving intuitive results.
The upshot is my mindsim has totally melted down. My inclination is to find an open area and try it. There is not much point to add fins and create just another 24mm model. I also think I should go for the D12 v. the C11. Both RAIS and GDS need airflow, the more the better.