Now now. This is a very hot topic.
How would you rule Wissenshaft Crows?
How would you rule Wissenshaft/Solomon Gears?
I'd like to insert these elements in my campaign and I'd like a few ideas about them!
Right now the only thing I decided on is making a new "Module" for piloting gears, which will be the Gear Module, costing 100DP. Not only it allows to use Gears as weapons, but it also makes so that, while piloting them, your Attack and Defense values are the average between your Attack/Block/Dodge and Science.
That's as far as I've gotten. I still need ideas as you can see. I also hope this topic will be of help for any other GM which would like to include these things in his/her campaign.