The brake with the biped is easy. On downlines they let the upper aileron go up, the lower aileron go down. I guess that would be about the same as crow brakes.

The WindS has an even thinner profile. Actually WindS110 is a wrong name, it's more the Angel 110. The WindS 2m is a completely different bird. Only the colorscheme is the same.

The temperature your magnets can handle, is dependend on what type of magnet is actually used. but about 80 degrees is indeed the temperature that these magnets start losing their strength.

Dont forget.. when measuring you're measuring the outside of the motor, after a flight. If you get it at 65 degrees celcius on this measurement, then it has come close to the 80 degrees in flight, or even surpassed it.

Also, you don't get more thrust with the 18x12. This engine is more efficient with the 18x10.

I don't like the 18x12 anyways, but that's also a matter of personal preference. I try to maintain a slow and gracefull flying style... with the emphasis on 'try'

I would even try an 18x8 Wide, if it existed.