If you are having trouble peaking T1 for max audio out:
My rig would not peak. The slug in T1 was all the way out and I did not reach a "peak" in the signal. I soldered a 22pf capacitor in parallel with C1, which took the total capacitance to 69pf. I got a nice peak at about mid range of the slug.
If you are having trouble peaking and the slug is all the way out, try adding capacitance. If the slug is all the way in, try reducing C1.