TR4A Choke Cable

["Jeff Porter" <jeffyporter@hotmail.com>]

While most people have the problem of the choke cable being to hard to pull 
out, I have it the other way.  It pulls out easily, but wont stay there.  
It pulls itself back to the un-choked position.
Im at the point of buying a new cable assembly.  There are two available, 
one is the original that you supply the knob and the other is an aftermarket 
model that has a knob attached.  Has anyone used the aftermarket type?  Or, 
better still, is there a way to keep the $#$# cable where I pull it.