I had reset issues with my RS as well. Tried the Kahr daughter board and that worked for about 2 months before the problems came back. Sent my boards off to Chris Hibler, who replaced a bunch of the smaller caps (Br2 and c5 stuff had been replaced sometime before I got it), fixed a couple of bad thru holes, and installed new header pins. Meanwhile, I replaced the IDC connectors with Molex ones and got rid of the Z connector. Should be bulletproof for another 25 years!