Pelikan M150 tines won't stay in alignment

Hello,

I recently purchased an old style Pelikan M150 with a medium nib. The pen is in excellent condition and may be NOS. Out of the box the tines were out of alignment. I removed the nib and feed from the pen and realigned the tines in the usual way. The pen will write well for a few words then the tines become out of alignment once again. I have tried pushing one tine over the other, then under the other, then push up on one and down on the other but the tines will not stay aligned. I have a light touch to the paper and do not press down on the pen. Is there anything else I can do to keep the tines aligned? Any suggestions will be appreciated.

Regards,
NK

Are the feed and nib aligned to each other?

Sometimes a nib can shift while writing causing it to push up one of the tines.