So slat cutting for beginners ?
Stop at far end , one clamp and all end up the same length !
Bit of hard work as the saw is made for picture framing and so is a very fine blade , however this results very little tearing and a nice square cut that only needs a wipe over with a sanding block to be usable , luckily the wood is very soft pine.
As you can see there are also some spacers I cut on the same set up , however it dawned on me they are not needed in the final build so more airflow less to glue and paint

[ shame I have already cut about 50

]
So one of today's quandaries ?
a) do I screw the slats in - a lot of screws - a lot of work drilling pilot holes and screwing in by hand [ old school ! ] however it will come apart
b) nail and glue - quicker - cheaper - irreversible
The second quandary ?
As well as not using the spacers the position of the hinge post is causing some head scratching , I think I have the box not quite high enough and so this shows the seat end [ on the right will come to a point [ yes I have it on upside down and seat back slope is below the hatching ] so there is no material to screw/nail that end slat to and also no material to fasten the next hinges to ?
It may work if the hinges are rotated 90' and that plank sits horizontal , only way to find out is to try it in the car , hopefully today if the weather holds.
I am sure an answer will come , if not I can spend my time slat cutting I am still about 9 short

Paul