Echoplex preamp

[kyle31]

I'd like to build an ep-3 preamp as a stand alone pedal. I'm sure I can build it off just a schematic but i'd like some help in finding where the preamp stops and goes into the delay circuit.

It seems simple, just 1 fet. I'm thinking the preamp is everything between input and output without going past the circled 10 or 23 on the schematic. Please let me know if this is correct.

Thanks

http://www.aronnelson.com/gallery/main.php/v/Caseys-Vintage-Effect-Page/album31/echoplexep3b.jpg.html?g2_imageViewsIndex=1