When you're going through the trouble of building something awesome, you should at least expect to be able to change it any way you'd like. Right?
Well get ready. The Muffsy Phono Preamp and Power Supply can be modified to suit your exact needs. Other gain levels? Check, Audiophile resistors, new operational amplifiers and output capacitors? Check, check and check!
The input impedance and capacitance can be altered, and you can change the output voltage of your power supply.
All this and more, at the Modify It page.