I'm so glad to hear that you did this! I've been wanting to make the same mod to our 3008W -- ever since the night DH went running through the bathroom to get outside & shut the water off (burst pipe!) and ran SMACK into the narrow edge of that DARN SWINGING DOOR. With his face.
Two black eyes and one bloody nose later, I almost
had him convinced that a sliding door was the way to go. Almost.
So we just got our trailer back yesterday from 3 weeks in the shop to take care of a bunch of things. One of which was to have the dealer look at making this mod for us. DH was afraid of drilling into the wall, potentially damaging some wiring or pipes or something, so he wanted the dealer to do it. Unfortunately the dealer had a similar reaction -- it seems they were mostly worried about hanging the door securely, so it wouldn't pull out or fall down over time.
So I've got my swinging-door trailer back home now.
And I've got this post from you, reminding me that it is indeed possible!!! Gee thanks.
Please let me know how you make out with this. Yay you!!
Did you reinforce the wall in any way, where you drilled into it?