I am building a cockpit for GT5 launch myself. Does the shifter for the G25 open the same 5cm?
Both, G25 and DFGT use two clamps on the sides of the wheel base as fastening system. At least on G25 the distance between the clamps is about 18.5 cms and the maximum clamp openning I measured is about 5 cms. Too much for your 7 cms table, sorry.
Yes the shifter has the same opening just a bit under 5cm.