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"MODEL 408S CONTROL EXPANDER
FLPG（Passive LPG with tone control fader"
via P4L (patching for life)
"This expander can extend the functionality of the 208 module by adding a number of inputs and outputs.
Many CV inputs have already been added to the 208C, but using them as secondary inputs makes the behaviour more complex.
This expander was fully tested on Buchla Clone 208p.
And will works on many Buchla 208 and clone machines, but not on 208r Rev.1.
( Depending on your module you may need to change the resistance value. )
Built by hand in Japan."
