An Ilex #5 works best with a long-throw cable release, but there is also a tendency with these old Ilex shutters for the throw required to get longer and longer with use. It is also quite easy for the T and B settings to get out of adjustment. I believe these don't require complex repairs, but have the shutters serviced and you should be able to use a conventional cable release and T and B should work. I've had both of the problems you describe, and both were repaired with a normal CLA.