Thank you all for your comments
Cockpit (partially) is in the fuselage... Control stick, hydraulic hand pump, IP/rudder pedals and seat with his harnesses are missing for the moment.
It seems that my project hadn't the canvas anti glare shield atop the IP, so, I had to cut the part on the kit. And some details to add : the « body » of the instruments behind the IP with some wires.
But I had to lengthen the front part of the cockpit to hide the underside. I made this with a part the cockpit floor of the plastic kit. I also added a firewall to close completely the cockpit. I made this with the rest of the cockpit floor of the kit.. Seat added... Missing only control stick, hydraulic hand pump and N3a gunsight... The end of the cockpit soon