Hello again,
thank you all for your kind words.
Yes it makes a big difference and yes, pictures don't show the effect as it is but wait until the lights get on.
So i have bad news and good news.
Bad news first.
The Batteries boxes arrived today. (Yeah i know, "why is this bad news ???" )
Well, i ordered AAA Boxes and they send me AA. That's the bad news.
There is no way to fit these into the base, even single Batteries without anything around are at their limit.
Here comes the good news.
I have no intend to wait any longer for the right batteries boxes,  i will do it    my way  
Here we go. Tape the two Batteries together
Solder one side together (1,5 v + 1,5 v  gives us 3v, that's what we need for the filaments)
Solder the other side to positive (red) and negative (black)
Carefully insert the package into the base
That's the end position
now tidy up the cables a little
Done, nothing extends, the batteries don't move at all, they are fixed by the cables
As Revell-Fan pointed out correctly, this is   
NOT   the right way to do it. !
Do not solder directly to Batteries, they could explode.
If you decide to do it the same way you do it at your own responsibility. Wear Googles and secure your surroundings against any Fire hazard.
Although i did it that way, i strongly advise against it.
That being said....
Now comes the best part, switch to the on position and enjoy
That's the effect i wanted to achieve when i first thought about the font -Led combination. I'm happy it turned out like this.
One more thing missing,    the Phantom,