Thanks demik.  I should be making a third version which should be close to final.  Now that I can cut screws at whatever length I need, I think I have most of the final pieces I need.  Now, if I could find 4-40 lock nuts in black color, I will be golden!
TheProfosist, great idea!  Now, I think PLU is 95% Filco in design (except with crappy PCB and only 2, 3KRO).  But I don't think we are certain that PLU is 100% compatible.  When will you receive your PLU?  When you receive your PLU, will you be able to open up a Filco and put the Filco innards inside the PLU case?  Then we will for sure know that they are compatible or not.
How much is shipping?  That is a good price in that you get a case, switches, stabilizers, *and* an ANSI 1.25x plate.  PLU is plate-mount, is it?