berg shifter

*****updated with new pics***** Been loving driving this since I bought it last year. She who must be obeyed means I can only have one project at a time with the imminent and no doubt painful conception and rebirth of the 'Windy Wagen' (watch this space) this car now has to go £3,500 ono...

I want to make the gear shift as good as possible on my oval. I got a new genuine gear coupling, Scat shifter and new gearbox mounts... Question is, will replacing parts 11 and 12 here make any difference? Thanks. :)