It doesn't look like the positioning of intermediate leaves needs to be high precision. Springs between adjacent leaves.by hanelyp - Let's design something! (I've got an idea ...)
Some modeling based on the drawing at Lisa variant concept by A2 kinematic model I observed a sizable volume at the top that is never intruded by the arms or head. Might be a good spot to install build filament handling. Arm length in the animated model gives a large horizontal build span, bug enough to not fit out if a single object filled it. The largest cylinder that fits the build volumeby hanelyp - Delta Machines