NOTE - summary differences from a MOSFET stage:(MOSFETs are an option but not recommended except with taller heat sinks and a case other than the Lansing custom)
RB12L/R trimmers are 2K ohm
QB1L/R JFETs are PN4392
RB4L/R, RB5L/R are 100 ohm
RB8L/R, RB9L/R are jumpered out
Heat sinks should be 1" tall
Recommendations for the BJT (Bipolar Junction Transistor) output transistors can be found in the Bill of Materials
Also, please refer to user Steinchen's revMH Diamond Buffer web site for reviews on the sound characteristics of the different BJT output transistors. Most of the recommendations for the BJT output transistors found on beezar.com are due to his excellent work and reviews on the original Diamond Buffer boards for the revMH Millett Hybrid. Construct a MiniMAX according to the instructions and recommendations on our MiniMAX website, and you should find results that agree with Steinchen's reviews.
The BJT Diamond Buffer version of the Millett is a proven and fully-vetted design, long before the design of the MAX (as referenced above).
The BJT Diamond Buffer is the recommended choice for the MiniMAX output stage.
Manufacturer specification sheets for most of the recommended output transistor complementary pairs are here: