I didn't think too highly of his soldering of the DB9 connector and the LM317 regulator, he spends way too much time applying heat to the heat sink of the regulator overheating it. He left too much bare wire on the DB9 and he should have secured the db9 connector in vise grips or something to stop it from wobbling. Ok, mine is not perfect either but he uses too much heat. Practice makes perfect so they say :)

