Only the linear regulator gets hot and there is still enough headroom for air to flow through convection. Since I used PETG (which is stable up to ~80°C) there shouldn't be any problem and my test leaving it on for 12 hours didn't show any real heat problems. Print takes around 14 hours on a...

I finished my 3D printed case. You can find the files on thingiverse.

Your forum profile says that you are located in germany. If that's really the case, you could order the OPA551PA from reichelt.de oder conrad.de since they both have the chip available for order. I also thought about replacing the OPA551 for something different, but in the end didn't do so. The...

Thx. I'm currently designing my case. It will take some days until I got the 3D print right (PETG). Hopefully the big MOSFET won't radiate too much heat for the case to handle material wise.

@pmillett : It seems that the dimension of the upper left hole in the PCB drawing is wrong (it's 2,8125 right now, bigger than the PCB itself). The assembly guide also mentiones that I could find the DXF file of the PCB on your website, but I wasn't able to find it (Wanted to use it to design a...