I noticed that the Conklin nib is similar in size to the Noodler's size 6 nibs and decided to attempt fitting my (newly acquired) 2009 Conklin Crescent with a Noodler's flex nib. Surprisingly, the Conklin's feed supplied the flex nib with plenty of ink to handle all kinds of flexy writing. The repair question I have concerns its ink sac. I unscrewed the section from the barrel and the crescent bar caught hold of the sac and tore it off the sac nipple. I attempted resaccing the pen with the same sac several times over only to have the crescent bar take hold of the sac when screwing the section into the barrel. Does anyone here have experience with resaccing these new Conklin Crescents?