First,I don't know why it worked before and now it doesn't and I'm not sure it matters.
Second,I only use a Bitzenburger so what I see and do,may not be exactly the same for you.I use Fletchtite Platinum for glue.
1.Here is a feather clamped,leaving the quill out of the clamp edge slightly,like others have suggested.You should be able to push the clamp and fletch down on the shaft and as you push down,the quill should conform to the shaft.
2.I shoved the needle tool between the quill and shaft,just to create a gap,as you have described.
3.Since I now have a gap between quill and shaft,I use the side of the needle tool's tip to drag down on the quill,starting from the front,going all the way to the back.It should now make contact-full length.
I'm hoping you can understand this and that it can be applied to your dilemma.If not,hang in there and be patient.Someone here will be able to get you there.
Sorry,I had pictures up but Photobucket seems to have changed how everything is done and is now,not automatically sizing all pictures.I edited them out as they are to big.I'll have to learn how to do it all over again.
If I can't figure out how to resize them,I will PM them to you,Scattergun.