rocketfin (at) ukr.net
Yes it was the right email adress. I asked some details and got the answer just a few hours later !
Something that might interest freedivers, some parts of the answer from Rocketfin:
"Hello! Glad to hear new people
...
We ,made a monofin for everything. At first We start make a monofins only for finswimming (about 5 years ago) but now We made a monofins for:
freediving,finswimming,orientiering,lifesawing and active rest.
Well, We have different kind of stifnes from very soft (No.1) to a very strong (No.6), different sizes is not a problem for Us, We do it from 35(220) to 48(330), the angles We use for making monofins is individual for everybody, You just need to tell what do You need!
The usual price is 675$(this is standard price for everybody all around the world)+shipping(its depend from count of fins from 50 till 150$, the first kilogram is expansive and then every next kg is cheap).
..."
Really sounds that they can make good and nice monofins also for freediving.
The price is high. It must be really good monofin (and it's obviosly is), bacause so many finswimmers have it altought it's so expensive. Euro is now 1,5 USdollars, so the price is 675$=450€ + shipping 50-150$= 35-100€. So total about 750-800$ to US and 500€ to Europe. There can be customs, too. Ukraine is not in EU.
The footpocket size numbering is almost sure very tight for freedivers because it seems to be suitable(=very thight) for finswimmers. So freedivers should take a bigger size. If 330 mm is for a 48 finswimmer, it might be suitable for a 44-46 freediver. But that's only a guess based on other monofins. There are very small ones, too, like 220 mm (!). For junior finswimmers, i think.
Anyway it's a very good thing to known there are several top-class monofins in the market. "Rocket-service" seems to be much better than with e.g. Russian Hyperfin. Rocket monofin comes from the same country as WaterWay Glide, and Triton, which have a good customer service and high monofin quality.
BTW what is
active rest with a monofin?
Recreational freediving, maybe?
Finswimming is so hard sport that that kind of moving would be rest for a finswimmer.