Suptronics X400 v3.0 case

This is a case for the [Suptronics X400 v3.0](https://de.aliexpress.com/item/32403107876.html?spm=a2g0o.productlist.0.0.5e2929183adGcw&algo_pvid=c5e3243a-7ddc-4984-8268-28b4c36a8a16&algo_expid=c5e3243a-7ddc-4984-8268-28b4c36a8a16-1&btsid=0ab6f82215891314576252981e169e&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_) DAC and AMP combo.

"X400_RPi" is only for the DAC/AMP with a raspberry pi.
The second version: "X400_RPI_LAN" also provides spacing to use a [SPI enc28j60 LAN](https://de.aliexpress.com/item/32659767200.html?spm=a2g0o.productlist.0.0.69ae2a8bas3uXA&algo_pvid=0bf6c0ff-01a9-44ef-91da-afd9d9d7e5e4&algo_expid=0bf6c0ff-01a9-44ef-91da-afd9d9d7e5e4-3&btsid=0ab6f82115891318349793374e0aeb&ws_ab_test=searchweb0_0,searchweb201602_,searchweb201603_) adapter but only with a RPi 0!
Please look at the images if things are unclear.

Assembly and software setup: https://www.youtube.com/watch?v=HQ-0Or6-UzQ&feature=youtu.be