Hello Alexander!
Is there any news about the turbocharger boost pressure?
Regarding your question, user Kenny has already performed a similar modification to my knowledge base.
I was asked how difficult the renovation would be, and I received the following answer:
Removed the gearbox, put in a new gear, closed the gearbox. I don't remember if Kenny posted this.
but one of the people who allegedly carried out the renovation.
I was also planning to rebuild the 5th gear. But the mechanic isn't very cooperative.
In that regard, and I don't necessarily want to put two gears on my nightstand if you know what I mean *g*.
Okay... if it works out for you, I'll get you a bottle of red wine.
Almost as a bonus for having to follow only your professional instructions from now on

.
Best regards and good luck.