yes, I guess so. Just make sure to not mix the calibration data between the two: As the camera is different, you will need to use the new set of calibration data together with the 3.5nm frames.
Personally, I would rather combine the 7nm into a master, and the 3.5nm frames into a second master and see how it looks. The 3.5nm ones should reveal more details, at least in theory...
Btw, it's windy as hell today. 45km/h blowing from all over the place. The Veloce looks pretty happy despite the wind, while the iDK suffers from the pushing and pulling around 😅