Some issues with VOG2 Butterfly (Step 66)

[Bozo]

Hello, i recently started a test fold (with kraft) of the Nguyen Hung Cuong Butterfly, managed to follow well the instructions until step 66, it tell me to do a serie of inside reverse folds but i really can't find a way to do even the first one.
Ill try to explain better with pics:
https://i.imgur.com/A4EyY44.png
The step 65 tell me to do a valley fold following the blue line here (don't mind the other one, result of many tests i did trying out) and then reverse fold it inside:
https://i.imgur.com/MD6r9E7.png
You can see the crease on the right and the other side one on the left, that is the part i have to reverse fold few time to manage to finish like this :

(i tried to keep the screenshot minimalist to not be out of rule)

I know it will probably be impossible to understand for people which doesn't have the diagrams or never folded it but i hope some people here did folded that butterfly. And sorry for link as pics, pics were too big to display on the Forum it seems.
Thanks for help guys !!

[Goldtiger-997]

I was sad to see this post left with no reply, so here's my answer. It's been 2 weeks, but just in case you haven't yet worked it out...

I have had the instructions for this model for a while, but had never folded it before. It gave me the opportunity to try the 20cm Nicolas Terry Tissue Foil that I got for Christmas but was yet to use. So I've folded that step and should be able to give you some useful information

Anyway, in the step 66 reverse fold what you really are doing is just reversing all the folds that make up the outer part of the flap. (i.e valleys into mountains and mountains into valleys.)
Here are some pictures. I couldn't work out how to make them larger, but they are also links:
Before the reverse fold:

Reverse fold in progress:



Result:

I hope this helps!

Edit: Here's my finished result, if you want to see it

Butterfly - Nguyen Hung Cuong by Goldtiger997, on Flickr

[Bozo]

Hey !
Thank you very much for your help, been very busy last month so i couldnt give a new try, your help with greatly be appreciable !
Sorry for very very late answer, i feel very bad for it as you helped me.
I keep you in touch if i manage to finish it !