I posted this in random thoughts, but it's rather relevant to this thread too. I got my two RBV7's today, and got both of the Hell beyblades. Kinda didn't want Hell Horuseus 85RS, but eh, it could be Tornado Horuseus 130RSF, so I'm not complaining (much. Okay, I am, but eh).
I don't know if anyone has scanned the TH170 Mechanism Diagram from the instructions, but I hope that upper part makes it all really strong, because the height changing part is literally an elongated CH120, from what the instruction diagram shows. It looks like there will be a gap in the middle in 220 mode, too (like the centre part of CH120), which might be prone to breakage if hit hard... I'm a little concerned, especially given my trouble with CH120 breakage.
I might scan the instructions tomorrow, if no one else has.
That said, as of right now, if I didn't have all the parts already, I'd rather get Gravity Perseus BD145XF. Unless Beat turns out to be amazing somehow, that is.