Camp bed joiner

A joiner for my camp bed was broken. The original part is used for both bed sides (to need only one tool ?), but one side of the part is much weaker than the other and broke. I reconstructed the original part, omitting the weak part, as I can print it mirrored. This is the first design (7a).
I than thickened the parts which will give strength and which have no given measure (9).

9-right modified 7a-original

Now a foot broke and I made another replacement part (https://www.thingiverse.co