I carefully layed out my panels and coated the scarf joints with east system epoxy thickened with cotton fibre to the consistancy of honey,I then stapled the scarf together and left it to dry.I returned 24 hours later and removed the staples when I lifted my first 17 foot panel it cracked right beside the scarf where the epoxy ended.what did do wrong or was i just not careful enough lifting the panel?any help would be appreciated.