Perfect pre-felt using The Gentle Roller

Joni Cornell describes a 'perfect' pre-felt using The Gentle Roller. What Joni looks for before she fulls the pre-felted fabric.
This is a short extract from the video 'Using The Gentle Roller to make an irregular shaped Nuno-Scarf'
The Gentle Roller is available for pre-order on Kickstarter until January 28, 2018. Use the link below to pre-order yours now.
www.bit.ly/GentleRoller