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2020-10-10 01:49 DarkStoorM  
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This one is interesting, because it involves a little paperwork  
  
There are 13 "true" bonus diamonds, but they are really hard to get ;)

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2020-10-10 16:51 DarkStoorM  
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Alright, got all 300\ Wrote down all steps and the sequence :D  
  
I will leave it for a little while

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2020-10-10 18:29 DarkStoorM  
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Alright, so my observations:  
  
Thanks to the CSO, you are able to save a falling object from under the fly one frame before it's about to get crushed.  
When dropping objects in a column and when the last object comes to a stop for one frame, the entire stack will carry a pattern of 2 objects to the top, which in this case, will stop when reaching the butterfly - blocking its movement down (assuming it's about to move in that direction).  
  
The diamond under the fly continues to fall and the next frame, fly gets crushed, resulting in saving one diamond.  
  
This run is a result of trial and error. To be able to save the diamond from under the butterfly, you have to collect the amount of diamonds, which is the distance to the center of each room -1.  
If the first room requires 5 diamonds to be collected, you have to get 4 and the last diamond has to be snapped with one frame delay, which will interrupt the stack fall.  
Rockford's movement has to be adjusted in a way that butterfly faces down and there is space underneath.  
  
The sequence is the following:  
  
Collect the required amount of diamonds -1, wait one frame, snap the diamond, wait one frame, [perform movement sequence].  
There are two movement sequences:  
 - (M1) move one frame per scan and position Rockford under the diamond stack, wait for one frame  
 - (M2) don't wait, move and collect the diamonds from the next stack  
 ; repeat  
  
Stacks:   
 1 (M2), 4 diamonds, wait, snap one  
 2 (M1), 4 + 1  
 3 (M2), 5 + 1  
 4 (M2), 5 + 1  
 5 (M1), 7 + 1  
 6 (M1), 10 + 1  
 7 (M2), 3 + 1  
 8 (M1), 7 + 1  
 9 (M2), 9 + 1  
 10 (M1), 3 + 1  
 11 (M2) 2 + 1  
 12 (M2) 5 + 1  
 13 (M2) 3 + 1  
  
except the last three columns were done differently, so it might be a little off :D  
  
The butterflies in the last stack are too close to eachother to save the 14th diamond

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2020-10-10 18:47 dustin  
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very interesting  darkstoorm !  
i think it also depends on the butterfly facing direction, doesn't it?after it's free to move down, it could still wait for 1 or 2 frames (assuming that rockford collects the diamonds at random times).   
  
i have to do some paperwork, too. now! :d

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2020-10-10 19:20 DarkStoorM  
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I think this might end up creating another CSO cave :D   
  
It's interesting, I think you might be able to collect diamonds from a stack and block a fly preventing it from getting crushed from the right side, but I haven't had any cave ideas in mind with that yet :D

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2020-10-10 23:49 dustin  
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yeah, i like this cso trick a lot :D  
i found slightly different ways to go for those bonus\, but the difficult thing is always to react on how quickly the butterfly starts moving!

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2020-10-11 10:35 nesdori  
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i used this similar trick in bdash plus 2 cave 7 (remake) by  Arno . the set-up is a bit different there but i used similar snap-to-save \ with the first fly :)

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2020-10-11 13:06 DarkStoorM  
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Ah! I knew that trick was not new. Nothing can hide from  nesdori ! :D