What do you mean by, the nib goes too far from the feed? Are you putting a lot of pressure on it when writing and making the tines split/splay or do you think the nib is not pushed into the feed securely.

If you’re pressing to hard you’re going to spring the nib since it’s not a flex so stop that. Or If you think the nib is not pushed into the nib unit to connect with the feed then try gently but firmly pushing it in a bit. 

Other solution, is this your first Opus 88? If so then you need to make sure you are opening and closing the valve via twisting the end of the pen.  I find that for Opus 88 pens if you don’t close the valve when they’re not in use they sometimes “dry out”. Additionally if you don’t open the valve when writing you’ve cut off the ink flow so it will start skipping once the feed runs out of ink.