The Betty Boost is a high impedance clean booster, based on the DOD FX-10. The bypass switching was changed to true bypass. The original unit claimed a signal boost up tp 17dB. It also sounds great on 18V.
The dimensions of this pcb are mm 40.5x 40.5mm. This pcb is included in the ready to solder kit:
This project is by Lectric-fx. Since the modifications featured in this project require some basic knowledge, this project is rather for more experienced builders.
Here is the direct link to the manual with layout and schematic: