I already planned it out with the Radio Drama dialogue, and it works perfectly well.

Anyway, there's something of a continuity issue with that scene unless you place it before the opening shot of the battle, which isn't easy. The problem is that Luke looks up and sees a battle, but by the time he looks up, the battle is already over and the Tantive IV has already been pulled inside the Devastator. Sure, it could be concurrent time, but it just doesn't play out like that when you see it.

But seeing as my planned "workprint" was never going to all be DVD quality, I've decided to re-order the scenes slightly and we actually meet Luke before the battle. It's possible, we've already done a rough cut. I might put some a montage up to show you the sequence. As the crawl ends, the title music comes to a rest. The original swelling strings as we pan down to the matte of Tatooine is replace with an edited version of the Binary Sunset Alternate cue, we pan down to the planet from a distance, to desert, eventually finding Luke at work (long shot). He sees the battle, we see a new shot through his macrobinoculars, and then the swelling strings come up and we cut back to space. The other two sequences with Luke at Tosche Station then appear in the originally scripted place.