I received my Gladiator last week and now I'm having fun with DevConfig

Thanks to the forum & manual I have already managed to change a couple items but I have some open questions and would appreciate some help from the community please:
1. Is it possible to create a virtual relative axis and to control it with two buttons or a rotary encoder ? I have seen that I could use the mini stick in relative axis mode and that's great, but I would like to use the left rotary encoder as a virtual axis if possible. I tried the rel axis mod and didn't manage to impact axis 7/8.
2. If 1. is doable, is it possible to assign two different axis thanks to the shift mod (7/8)?
3. What about the axis 7 and 8 shown by the tool for the gladiator ? I know it has only six physical axis and I guess the two others are here so that we can set up virtual axes, but I have never managed to impact them despite different setup. I even tried to reassign the mini stick to axes 7 and 8 instead of 5 and 6, after copying the config of the axes 5/6 to 7/8, but no visible impact in the test window.
4. LED question: in default mod the joystick starts with the pov and can shift to ministick by clicking on it, in which case a red light is shown at the top of the joystick. I changed the defaut setting to ministick and there is no more red led, even when I change from ministick to pov, is it possible to set it back ?
5. Can I use the mini stick to control axis 5/6 and by clikcing on it I move to 7/8 ? Like two mini stick modes instead of a mini stick and a pov.
I have not managed to get a throttle yet so I miss some axis as you can read

Thanks in advance for your help, I would really appreciate some light !
Thanks
Tigo