Some new shots...
as for the blockade i will be adding a couple of extra stardestroyers to the initial approach and a disabled stardestroyer in the background during Lukes escape but what i was saying was that Luke could easily slip away unchallenged because its just one fighter and a transport did leave just before he escaped so any remaining stardestroyers (which would only be one or two at the most) would be concentrating on the larger ships, so no need to add loads of stardestroyers for that scene. After all Luke is going in a completely different direction than the rebels so he most likely leaves in the opposite direction so you wouldn't see all the disabled stardestroyers which seem to concentrate above the rebel base on the other side of the planet. When the rebel transport escapes the stardestroyer is now firing upon the ships and destroys one x-wing and after the stardestroyer is disabled you see the transport and remaining x-wing jump to hyperspace.