Bingowings said:
Luke has plenty of time to attempt to fire at the door (Chewie and Han spend quite a bit of time debating the smells coming from the garbage chute) we don't need to see it.
Merging the radio drama dialogue may be problematic Adywan got away with the Biggs line because it's over load speakers mixing it into conventional conversation with no audible panty-line would be a serious challenge.
No that little bit between Han and Chewie happens before Luke jumps in. I timed it. 4 seconds between Luke and Han.
As for the radio drama, I could do it easily. I have very little skills when it comes to video, but I am great with audio. As a matter of fact there are several lines in the film taken from the radio play, but the Biggs line is the one that stood out to me because it didn't have the swirly short wave sound that the rest of the cockpit transmissions have. A ring modulator would fix that