Takes me back 35 years or so!
My Krick U 25 started life that way.
Four slabs of wood 2cm thick about 110cm long.
Top 3 with a wide slot pre-cut in them.
Rough shape sawn using a hand fret saw.
Planks coated with waterproof PVA and bolted together using the threaded studs, previously araldited in place visible in the photos, to locate and hold them tightly together.
Then hours of work with grandad's old jack plane and, yes, a spokeshave!
Last time I used it, must still be in the cellar somewhere.
Mucho planing, shaving, sanding and checking with templates made from thick card🙄
Slabs are just visible in the pics of the engine room and Radio Room in the bow.
Happy days? 😁