@Alex, The oil pump sprocket is nice and tight, no leaks!

@Jason, No BSE, but the balance shaft seal isn't leaking. The oil pump seal wasn't leaking either when I gave it a look.

What I did find, as I had thought, was the lower tensioner bolt leaking oil. Luckily none of the oil ended up on the balance shaft belt of the timing belt, but I still wiped them both down thoroughly to make sure there was no contamination. I also found out that the balance shaft tensioner pulley also passes through an oil gallery. Turns out there was an even smaller leak behind that pulley. So I ended up pulling on some thread sealant on bolt of the leaky bolts last night. I'm going to fire her up again later tonight after the sealant has fully cured and I'll be back with an update tomorrow.