I haven't done that yet post chip swap. I prolly should hook it into a scope and re-calibrate.  I purchased it used very recently and adjusted it a bit to reduce noise when I got it.  The carrier wave was still very noticeable for me (especially when recorded) so I did the chip swap and have been pleased with the results.

I'm considering doing an A-143-9-esque mod as well after I get a little bit more familiar with the boundaries of it's current capabilities (and satisfied with it's placement in the rack).