10.5" fin box installation

Hi,
After routing out the hole for the fin box, cutting the cloth and dropping the box into the resin/cloth, What are the next steps?
I cant get my head around the cloth sticking up from the box. Do I trim it when it starts to gel? and if so where do I trim it to?
On various sites it says that there should be 2cm of cloth still protruding from the hole.
When sanding the fin box cloth back can I expect to be sanding into the weave to get it level?
Any advice would be appreciated.
Cheers
JACK
After routing out the hole for the fin box, cutting the cloth and dropping the box into the resin/cloth, What are the next steps?
I cant get my head around the cloth sticking up from the box. Do I trim it when it starts to gel? and if so where do I trim it to?
On various sites it says that there should be 2cm of cloth still protruding from the hole.
When sanding the fin box cloth back can I expect to be sanding into the weave to get it level?
Any advice would be appreciated.
Cheers
JACK