[Hallicrafters] S40 Advice please

[Brent Seres]

I have mostly finished my re-capping of the S40, and a quick check shows 
the radio to be operating okay, although I have done no real testing on 
it yet. AS I am new to this, I value the advice of others, so here goes:

Would you replace the filter caps, even if you don't hear any hum?

Could someone describe to me what the BFO coupling in the s40 should 
look like, The manual describes it as a "gimmick"...what I see is a 
short piece of hookup wire making one loop over  the lead going to pin 4 
of the detector tube.  I find that I have to turn the RF gain down a lot 
to properly copy most CW.

Thanks again for all of your help.

Brent
VE3CUS