To convert roller ball to fountain pen – $50 to mod the section, cap, and barrel end. $75 if you want a nib included. If the original section breaks during the mod process I won’t accept any risk. You agree to this if you ask me to do the work.
A new section along with barrel and cap mods is $100 without a nib, $125 with a nib.
A new cap will be $125 plus materials.
I will not work on their piston units, so no barrel or section work on these at all.
Making a replacement cap where the original celluloid rotted and failed. You can see discoloration on the barrel in the middle.
Modding rollerball sections to take Bock fountain pen nibs.
New cap – you can see the original has a split in the middle where the celluloid was shrinking. Replacement material is acrylic.