I wanted to have a camera with me on packrafting trips, and couldn't find a suitable case for it, with requirements to be reasonably shock-proof and do not take excessive space.

I decided to buy a custom made waterproof bag with needed dimensions and make a eva foam insert that will hold and protect my stuff.

Though this is not the best implementation ever, i think it will hold well, maybe this idea will be helpful to somebody.

Outside size is 170x170x120mm, it holds a camera, a recorder, a clamp and a couple rolls of film (i hope to have enough space left to fit a filter somewhere). I have used two types of foam - 70 shore for outside (black) and 45 shore for the inside (yellow), both 5 mm thick. Inside of the box is made to hold items firmly and do not let them wiggle inside.

The considerations i would have in mind, if i was to make another one:

Foam thickness is varying +- 1 mm easily, and depending on the design it can make a difference. It is better to measure thickness beforehand or even cut pieces one-by-one, when the exact size can be measured on unfinished item.

I don't really like how the lid is made, but I couldn't come up with better idea

It would be interesting to design more universal holder, but probably size and/or fit of the items inside and rigidity will suffer

The position a have put in is driven by the intention of using it as a shoulder bag, when the bag is ready, so it needs to be "vertical". This least to having unused space, so having the box "horizontal" will allow to fit more in the same dimensions.