I´ve got it yesterday for 80€, shipping included. It maybe simple for the people here but it is my first ever modification of this kind. I couldn´t use it as I own a d700 and d750 so modification was needed. It has also some oil in the iris but that will have to wait a little. I went through the excellent post by Richard explaining how to tear it down and, even I started with hesitation and looking for someone to do it, I´m pretty sure I´ll do it myself.
As of today, It is AI modified and it works without problem from f/2.5 to f/11. I tried M and A without problems.
I have to get use to manual focus! With tripod and lv the results are even better than I expected. Handheld is getting easier fast too.
1: the tool
2: with tripod and lv @ f/5.6
3: from same position shooting through the blinds also @ f/5.6