AquaBoy MN3205 vs MN3208

[BillyBoy]

Hi,

A while back, I built a 15v MN3005 AquaBoy.  All is well with that, very well, in fact!

I also built a 9v AquaBoy to try MN3205s.  It has stock values from the parts list, with jumpers for R55 and R27.  But I can't get any of my 8 MN3205s to bias.  I can't get guitar signal on pins 3/4 at any combination of bias, clock, and cancel settings.  Some even kill the input at pin 7.  I tried biasing them individually in the first BBD position.  None passed signal to pins 3/4.  Then I tried pairs of them, because I've had cases where a single BBD wouldn't bias if the second one wasn't socketed.  But even in pairs, none would bias.  I can bias MN3208's and BL3208's in there OK. 

Is there anything that might cause this, other than bad MN3205s?  There are some comments in the instructions about some resistor tweaks for R27 and R55, but they specifically mention V3205.  Other than getting the power and jumpers set correctly, I didn't see anything that looked specific to MN3205 (or MN3208 or BL3208).  I did try 100K instead of a jumper for R55 and 470K instead of the R27 jumper.  That didn't get the MN3205s to work, either.  I saw something about tweaking R18 and R26 (should that be R19 and R26?), but haven't tried that yet. 

If the build is working fine with 3208s, should I be able to pop them out, replace them with MN3205s, reset all the trimmers, and be good to go if the MN3205s are good?  Or will some tweaks maybe help?  Are jumpers for R27 and R55, and 82K for both R19 and R26 correct?

Thanks!