Be careful with airborne Talc when mixing. A P3 filtered mask is a must. 

outstanding guys !! thanks for teh info and the posts

CarbonFiberCreations

These are old skool methods.  I use wood in all my big moulds to reinforce them.  You can get paper rope with wire in it which is good for adding stiffening ribs too. 

have been using talc for a while its good stuff!

Garden hose cut to length and glassed onto the back of moulds make great stiffeners/reinforcement. It follows curves and is quick and easy to apply.

very interesting. i liked how they seem to have the wood pieces all planned and ready, like this is how their usual molds are done.
and using talc and resin mixed up as a stiffening medium i thought was a good idea as well.

CarbonFiberCreations