Are you using single coil or hum pups? How are you configuring the Mutron? You should be able to get a decent Jerry mutron tone with a stock guitar if the mutron settings are correct. Note, the OBEL is not a crucial as the buffer--if you're serious about obtaining Jerry tone, contact Wald Electronics and buy a TPC1 preamp buffer http://www.wald-electronics.com/
But, if your mutron is set up correctly, you should be good to go. Here are recommended starting settings for Jerry mu: Range = Low, Drive = Up, Mode = LP, Peak and Depth = 4. Tweak the Depth up or down as needed to drive the quack--leave the Peak at 4 (I tend to see novices turn the Peak up to high).