It would require for me to write a full report to answer this I'll underline the most important aspects...
1. I converted the damping rubber on both the cameras (extra work on the Fuji) so that the mirror would cause the minimum possible vibrance when moving to the "UP" position... The mirror returned vibrance, doesn't cause trouble since the time between the shots of the sequence is enough for it to completely settle, but working with longer delay times helps further.
2. I added a specially made spacer between the tripod head and the camera using a drilled piece of "sorbothane" of 1cm thickness.
3. (most important) I realized that "a good tripod for single shot" and "a good tripod for multishot" is two different things! In single shot the tripod must absorb and store the energy, with multishot the tripod must "suck" and "earth" the energy generated on the camera as soon as possible so that the system will be as energy free as possible for the next shot of the sequence... So I tried to borrow and test as many tripods as possible until I settled for su-pe-rb 40 years old Italian FATIF I now use... For wooden floors, I 've cut a marble base for the tripod and use three cones (like spikes) of the kind that some use on expensive stereo equipment underneath it (like some speakers have) and use the appropriate plates underneath the cones to protect the floor...
Thanks for sharing with us your insights!
I also use a 528C. But I have to say I don't always use the multi-shot function. That's why I wanted to know if there is any special "trick" to make it work better. Your information is very helpful.
Nonetheless, I still find the images made by 528C, even in single shot mode, stunning. Though I have more "modern" cameras now, from time to time I will still go back to use the 528C.
Thanks for sharing your tips again!