I have received one of the feders and tried it out; here is the video:
http://www.youtube.com/watch?v=WH0zIxnlX1M
The sword handles very nicely. It's flex is very, very similar to that of an Ensifer federschwert. The guy wearing the gray hoodie is holding the Krstičič feder, the other one is holding a Tamiza made by Szymon Chlebowski (i was asked how it handles compared to other swords on the market).
Here are the statistics:
1450gr,
130cm
POB 7cm
We're contemplating making a destructive test on one of the blades and posting it...
Also, for all the sabre fans: the last short-blade sabre is about to be sold, which means one with the longer blade will be made in the near future for testing!
Ah, yes, another interesting thing: There was a mix-up in measurments. A smallsword with a rapier's weight (a bit over 900gr - the heaviest smallsword i could find was about 820, but the average was around 450...). Since the piece is ahistorical, it is now available at half the price - 125 eur.

More info:
https://www.facebook.com/photo.php?fbid=240107512709658&set=a.240107172709692.73882.238755506178192&type=1&ref=nf
Regards!