^ Didn't realize yours went down; sorry to hear.
Yea guys, keep in mind the stock pistons aren't the most rock solid things in the world. If you catch it once it goes; you're not into it too deep to get a light hone with a drop in piston. Forged ones take the abuse like you wouldn't believe.
I've autox'ed the stock TD04, VF39, SZ55 (old FPGreen equivalent), stock location 30r. TD04 is obviously too small and you're leaving room on the table. VF39 and a stock location small hybrid were trade off's. The VF was responsive, had "enough" top end and recovered well if you made an error. The SZ55 was a little less forgiving, but more rewarding at the same time. If you drove it well, it had enough power band to be usable and the top end gave you an edge over the VF. So far I haven't been thrilled w/ the 30r for autox use. Powerband is a little small even with a JDM 6spd and the transient response is too slow. Definitely feel I could run faster times with the SZ55 or VF39 on most courses. E85 may improve the spool enough on the 30r to make it useable, but you'd probably get a benefit to improved top end w/ the others to offset anyway.
Thought I'd share a little tidbit for when/if you decide to go bigger in the land of turbo's.