DeMedio 312 Build... Resistor Value?

Hello all,
I have recently acquired a couple 325 cards to convert to 312 preamps. I plan on trying to modify this particular 312 after the famous Wally Heider Console pres, modified by Frank DeMedio (I know Jeff Steiger has done something similar... I want to do this using vintage 2520s and an original 2503 OT). The modification is fairly straight forward. I will be substituting the 2622 for a ER-0887 (made by Cinemag), getting rid of the decoupling capacitors on the IT's primaries, and replacing the Zobel network with a low-value resistor. My question is - which value resistor I should be using instead of the Zobel network? The resistor in the network as it stands is 10k.
Thanks in advance for any help!

Here is something that maybe can help you

http://www.racknrollaudio.com/Classic-Audio-Products-of-Illinois-Heider-FD312WHR-p/capi-heider-312.htm


But you must try with some value and test it!!!