Bad news, I'm afraid. York Guns(the Baikal agent) have had the weapon to pieces and replaced the seals - but once re-assembled it still leaked. They are now looking for a replacement to send to me. The IZH-46 has such a good reputation - I suppose there had to be one lemon out there somewhere.
In the meantime & to keep in practice, I've bought a second-hand Webley Alecto. Very accurate, and I've found it to be a much friendlier pistol, nowhere near as demanding as the IZH-46.

Kelvin