Just finished one of these today and it sounds great. I coughed up 5 bucks each for 2N1308s from AES and built it per the BOM. The 1308s read very different on a TC1 tester. One read around 150 hfe, the other over 400. I stuck the 150 in Q2, the 400 in Q3. No idea if that was a rational choice but it worked out. 2n3904s in the other two spots around 250 hfe. I don’t remember what the leakage readings were.