Flex Nib Comparison - Vintage VS Modern 

I have only a few modern flex pens and just two vintage pens with flex/semi flex nib. But the difference is noticeable right away with how well the vintage pens write and just keep up without issue.
My first comparison video between the Noodlers Ahab, Fountain Pen Revolution, & Pilot 912 FA can be found here:
• Fountain Pen Flex Nib ...
Pens used are the following:
Noodlers Ahab - Feed was heavily adjusted to increase flow
Feed Modification video: • Noodlers Ahab Nib Adju...
Fountain Pen Revolution - Ultra Flex
Pilot 912 with FA nib - Had to replace the feed with one from the Flex Nib Factory
Review with new feed: • Pilot Custom Heritage ...
How to Swap the Feed: • "Ask the Bud" Pilot 91...
Pelikan 140
Review: • Pelikan 140 - Semi Fle...
Aurora 88
Review: • Aurora 88 Fountain Pen...