Transcode to Editor

Hi there!

I have a project with an Alexa SXT Plus, Open Gate (3424x2202) with a 1.85:1 aspect ratio (so the project timeline resolution would be 3424x1854), setting the input scaling to "Scale Full Frame with Crop" so we don't have black bars on the sides.

Now, the editor wants HD transcodes (1920x1080). My idea was to sent him the material in 1920x1038 (so he already has the footage in the corresponding aspect ratio of 1.85:1.

He explained that he wants the ability to reframe the shots. My question is: if he wants to reframe, he would need the original footage, right? Or is there a way he could reframe if I send him a transcode that's already in HD? It has something to do with the input scaling?

Im using Resolve, he would use AVID.