Odd starter problem, pleade help quick!

This is quite odd I must say, after testing another starter and measuring quite a bit I've come to the conclusion that even after fully extending ther starter gear out of the starter it is just barely touching the teeth of the turbine.

it almost seems as if the the turbine is 1-2mm to far back but how is that even possible? I mean the flexplate should pull it into the correct position right?

Could the reason be that the flexplate might be slightly bent somewhere or do you have any otjer ideas?

Is there a way to het the flex plate down without removing the gearbox by the way? I'm quite sure I have done it before but I cant seem to get any tools in there, I wonder how I did that last time..