Well Steve may have a point, the original comment was that the front element was loose, which I took literally—Ie glass loose in its mount. In which case the mount has to come out for investigation and possible disassembly.
On the other hand if the front mount is simply not fully threaded into the shutter then, do so, and check focus. The collet nut for the Va is easier to get to than the V model, adjustment of the infinity should be straightforward if needed. Note that you will need to dremel a slot in a suitable screwdriver blade in order to loosen and secure the brass collet nut which locks the focus knob onto the focus shaft.