Anyone Build the UNO preamp ?

[petemoore]

http://myweb.tiscali.co.uk/nuukspot/decdun/gainclonepre2.html
 It looks very nice, 2.2 is a small value source resistor, of course so is 75 for a drain bias R value.
 I'd like to try one side with the Jfets 2n25457 and MPF102, I have a J201 here also.
 Any notes or particularities of the 2SK170 welcomed.
 Do I need the low source resistor ? I would guess that with the higher voltage a normal to large resistor would be used, [many Jfet R's use 2k7 or so] I'm pondering the use of the small channel/bias resistors