Craig,
Have you found from actual experience (flying a made rocket) that the Dv's are reasonably accurate? IOW, do you think shooting a made model with a C is a worthwhile experiment, given one is satisfied with the B launch?
This is one I am interested in making. If the B launch went well, I'd be tempted to try a C6-5; I tend to build a little heavier than some folks. The extra weight is mostly in the finishing process for me (plus I like epoxy).
Looks like in this case, a little extra weight might be good?
You are the expert here; what do you think?
Allen