I have a Pelikan 1000 with XF nib that ink just falls out of. I have been writing with a fountain pen exclusively for 35+ years. I do not have a heavy hand. This phenomenon occurs with all inks tried in this pen (7 or 8 different inks). I have sent this pen to a "repair shop" for adjustment and saw only slight improvement in ink flow. CAN SOMEBODY HELP ME??? Thanks, Doc