katerchenPen arrived yesterday, and I tested it with a chinese generic converter that came in a pen I bought form xfountain pens. It works like a charm!
Pen is nice and solid, and it write great with Pelikan ink.
katerchenK, I started looking at the length of chinese converters I had.
They are all over the place, with lengths between 64 and 73mm
The shorter ones fit fine, and the ones above 68mm hit a spring at the top of the barrel
Diameter-wise there is a few that are perfect, and some that are just too tight.
It is a hit or miss
http://www.fountainpennetwork.com/forum/topic/310579-faber-castell-loom-converter/
https://www.amazon.com/gp/product/B002P2T42G/ref=od_aui_detailpages00?ie=UTF8&psc=1
It got stuck in the barrel of the pen.
I'm still miffed that MD was unwilling to include a converter that's known to work if we paid extra for it. Because this way we have to go by trial and error.
-k
There are small differences (2-3mm) between the cheap converters I have; the taller ones I have don't work. It seems like a mini converter like the Monteverde mini or the Kaweco will be the best option Goulet pens and Pen Chalet have those for less than $5 http://www.gouletpens.com/mv31072/p/MV31072 https://www.penchalet.com/pen_accessories/fountain_pen_converters/monteverde_mini_ink_fountain_pen_converter.html?gclid=CK_tsMiLy84CFQMtaQod35cKpQ