The missing schematics diagram is online now (Thanks, Kevin !). You can find it at <http://www.synthfool.com/diy/hjob8pmm.gif>. The description is (still) at <http://www.synthfool.com/diy/hj_pmob8.html>. As you can see, not many components are needed. Just a little patience to do the same thing 8 times. JH.