INX5 + JLM GO between PLUS kit makes a 51X or 500 series Mic preamplifier (See LA500 & LA500A build threads on this forum)
INX5 + JLM MAC comp kit makes a 51X or 500 series opto compressor (See BA500 build thread on this forum)
These are the first two project we will be making full metal work for with more to follow.

Parts list here
Schematic here (Right click and download and open with Adobe X reader)