German registered glider : 3000h inspection, allowed to do it ?

On a German registered glider.

Has anyone been allowed by the LBA or his local Pruffer to carry out
the 3000 hours (or 6000h) inspection himself ? What was the concerned
glider ?

I'm not talking about major or important repairs (if there are any
needed), but about the inspection + replacement of parts.

Leaving out any consideration of "having the skills", or "it would be
safer to take the ship to a certified workshop", "..." :
- Is it possible (as in "legal" or "authorized by the LBA") to carry
out the inspection ?
- Has any one done it himself + been approved by his LBA prufer ? which
glider was it ?


Thanks for your feedback,
Ludovic