Its basically just a lot of work with the shelltool and Morph, buit its makable - in an segmented way.
My poor laptop is just too slow to make a quicktime-vid of the workflow - you have to wait until i can use a faster computer to get a Tutorial-video from me.
Just draw the half - you can mirror-duplicate it later.
First - you have to draw the thing from side-view just in lines - the outlines with lines and splines for the curving.
Then - segment it from a inner centerpoint
make some morph-lines from the curve to the basline to get them in 3D
Draw the front rectangular base-contour with morph to get a full morph surface
when switching to 3D, you will find the recangular shape - which you can draw out the depth.
than you draw further ceonstruction-lines in each segment to get the basepoints for some complex shells.
then You just have to adjust the shell-baselines to get the shape correct - for each segment.
If You have all shells, You can make the Base-Morph bigger - so You can SOE-Cutout the Form from the shells ..
Sonuds complex but its makeabel - In some hours - i'll make a Vid..
AC5.5-AC27EduAut, PC-Win10, MacbookAirM1, MacbookM1Max, Win-I7+Nvidia