Reading alone does not provide enough information. They will require verbal instructions for less complex steps. For more complex steps requiring problem solving, they will require a demonstration.
In order to form the correct mental image of what they need to do to arrange the triangles on the fabric and Heat n' Bond materials, they will require a few demonstrations.
The person can follow a demonstration of cutting a triangle piece using the template, pealing the paper backing on the Heat n' Bond and ironing the pieces into place.
They are likely able to go ahead with making the windmill pattern.
The person's manual actions are fluid and they can carefully peel the backing off.
The person may not cut the pieces very straight and these maybe roughly placed.
Bubbles in the vinyl are noticed and they will try to smooth these out.
They will likely need verbal instruction to use a protective cloth while ironing the vinyl disk into place as preventing errors may not capture the person's attention.
Surface appearance like noticing bubbles on the vinyl enters the scale at ACL 5.2.
Score
The tentative score is ACL 5.2.