Lie flat design is a mistake

[derekfountain]

I think on reflection the lie-flat design is a mistake. The tips of the 90deg edge connector, and all the TTH components, poke out the base of the device by a couple of mm, then the 3D printed case adds another 1mm. The lower PCB itself lies flush with the base of the ZX Spectrum, so this extra thickness below the lower PCB prevents the Spectrum and the interface sitting on the desk at the same level. See this image:

https://github.com/derekfountain/zx-spectrum-pico-interface-one/blob/main/images/case_offset.jpg

My bodge fix was to add 5mm spacers around the Spectrums rubber feet.

The ideal fix would be to create a design like the original Interface One, which sits partially under the rear of the Spectrum, tilting it at an angle. That's quite hard, the fittings and angles would need to be spot on to make it work.

I think the best fix is to work to reduce the size of the device and return to the upright design.