I got some of those kits in the rollerball style when I saw the one you made in African Blackwood (I think that was the wood?). I wrote up a review of it since it isn't something I've commonly seen around here. If you care to comment on the fountain pen version, or have anything to add, others might find it useful. It's over here: https://www.penturners.org/threads/conservative-review.169820/