This project is designed around a PIC32MZ EF processor. We use its internal ADCs in an interleaved mode in order to get the full 20Msps, giving us 10MHz of bandwidth. For comparison, this is 20x the sample rate of the DSO Nano and 50x its analog bandwidth. Note that these numbers are tentative as we have not yet assembled a unit.
Here are some glamour shots of the finished PCB Layout: