Barbolight U-09 how to open head ?

i was showing off my lights to some friends during a camping trip and noticed that my once amazing Barbolight U-09 with 3 lux 3's had the same output as my DX XR-E U2 clone. this got me depressed and so i decided to try to upgrade my U-09 with some XR-E's.
The problem is that i cant find a way to open the head. does anyone know how ?

Thanks

Hello Amonra

You have to remove the window.
For this, remove the O-ring in front of the window.

You can try to glue a big blob with a hot-glue pistol on the middle of the window and glue a nail within this blob.
After hardening, when you will be in luck, you are be able to draw the window while pulling the nail.
Remove the blob from the window with your finger nail.

If this will not work, you can try it with a needle at the border of the window, but be aware, with this method you will damage the window at the contact points. Be careful at the second O-ring with the needle.

For a new window or O-rings, write Javier a message, in the case, all will fail.

Good luck and best regards

____
Tom