Hehe! Benjo's entry is seriously innovating for Kamen Rider fans!
Well, on the topic of upper attacks- I think its weird.
Upper Attack exists according to many, but on basis of what I have experienced, the metal makes an upper attack almost impossible. Plastic to Plastic contact or even Metal to Plastic contact creates a high class upper attack. I don't really know what it is called, but I think the reason is the resistance of plastic which makes the opposing wheel 'stick' to it and hence also create upper attack.
I've managed to lift plastic generation beys with my MFB, but MFB vs MFB Upper Attack seems impossible to me...
But, I can't say much as I haven't even 'seen' a Screw wheel as of now...
The only way by which upper attack looks possible to me is against BD145 as it would be Metal to Plastic contact... But even that, is impossible.
First off, you may need a height 80-85 track to get below BD145. This is possible to some extent, especially after the 80 track is released.
Secondly, to get below BD145, you must use it in Boost Mode. Hence, you'll be using Hell. This makes the combination too heavy, and thus you cannot get upper attack against it.
So, my theory is simply useless.
I seriously have to see a Screw wheel now... I wonder if my friend has it.. :\
@T.L Drago- Wow! That looks so good! Well, seems like its a pen, with a BBT (BBP) pen decoration.