for the center shaft
you can use a metal tube to hold the 2 shafts
then you can change the length of the shaft
but it will increase the size a little
but should be strong enough if the right tube and screws is used
for the center shaft
you can use a metal tube to hold the 2 shafts
then you can change the length of the shaft
but it will increase the size a little
but should be strong enough if the right tube ...
it is now using metal tube so that length can be fexible.
the tubing is difficult to make as need to calculate the centre shraft should be 100% straight and fit to the car kit.