Jodel 1050s vary.
I've been a share owner in 3 Jodel 1050s, and they all had different widths of cockpit, They also varied in head clearance when the seat was adjusted for my leg length. The present SAN early model is the tightest. An early CEA model had the most room.
Not fitting in one doesn't mean you won't fit in a different one, and vice versa.
The seats go lower as they slide back, so your leg:trunk ratio affects the available headroom.