BYOC Lazy Sprocket Instructions Manual page 10

Step 5: Add the transistors. The 2N3904s are highlighted in red. The
2N5457 is highlighted in yellow. Make sure that the transistors' curved
sides and flat sides match the layout.
Using a SK30 JFET: If you wanted to use an SK30 JFET, the PCB has
eyelets to accommodate this. The SK30 has a different pinout from 2N5457.
Insert the SK30 into the PCB in the transistor space highlighted in yellow
following the same orientation, but with the lower leg of the transistor going
into the lower 'D' eyelet.
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