Sailor 21K nib (Progear) compatible ebonite feeder has been developed.
this feed is only compatible with grip sections developed for ebonite feeder.
following has been adjusted to fit Sailor 21K properly:
1. feed length
2. air channel adjusted to match heart hole position
3. nib groove amount adjusted
4. nib groove position and length adjusted
next feed to work on is for Parker duofold international 18K.
