The Srixon Z745 does require an adaptor. We have the Z Series adaptor (our code SG1002), Hopefully the head still has the sole screw in it. The adaptor does not come with a screw. The screw is designed to stay attached the head. You just loosen it, remove the shaft with the adaptor or change the setting etc., then re-tighten. If the screw is missing, you will need to get one and will probably have to contact Srixon to see if they can send you one.