I've just had another Classic pen set returned for repair . The plastic threads have cracked and fallen apart. This is the second set I've had with problems . The first I assume he dropped the pen or stood on it, but this one just fell apart as he took the cap off whilst sitting beside me .

I have also had problems with the cap screw on part before, the one you glue on, but usually because my glue job was sus . Care preparing joint, metho wipe before glue up, and good epoxy seams to have fixed that problem. This problem seems to be the plastic just fatigues.

Anyone else had similar problems?