Sig Hi Torque Prop?

[42-n-startinagain]

Saw some locally. More pitch, wider blades basically. I would assume more rubber strands are needed for this which of course causes structural problems. Anyhow, has anyone used them or know what to expect over stock Guillows props?

I am working on Rubber Powered 403 Spitfire. Not so lightened.
Trying to decide on prop and rubber loop count. All the weight it would seem I need more torque.

I searched and found nothing on the Sig high torque props.

Thanks!