I just got a GC3, .. from flyer inside .. 2 lengths, 105 for grip shift, standard 140..

thats how much bar they occupy ..
GC3 longer bar end, GR2 , and others are shorter..
1 bolt sets the position for both, integrated but separate adjustments.

On the bars with grip shift I felt cramped , Bike Friday, 3 pc. straight bar.
but when I put the short ones on my Brompton.

they seemed made for the site. .. but longer bar end,
keeps the folded down bars from latching,

So plan be is mix and match.. GR2 standard grip, on the gripshift bars
put the shorter bar end on the other bike .