Merlins VSM placement question

Hi all,
I currently own a pair of VSM-MXe for a year now - Very happy with them after trying different front-end and preamp/amp
Despite swapping gear in/out, I notice that the soundstage is always somewhat narrow, too focus at middle (same plan with speaker).
My room is 23ft long x 16ft wide x 10ft high
Speakers are 7ft apart and 5ft from front wall (16ftwide wall). Listening seat is 7.5ft from speakers plan
The whole set up is 1.5ft off to the right of center axis of the room (due to door access)

I followed exact Bobby's instruction including toe-in angle using included tool

My question is did you're Merlins' owners followed exact set up instruction from Bobby, regardless of your room's dimension ? What's your placement dimension?

I want wider and deeper sound stage, not too forward
I have a feeling if I move apart extra 1ft between speakers, or set up the toe-in 3ft behind the seat, I would change the sound stage as I wanted

I have Jim Smith's Get Better Sound with me, but I'm kinda lazy unless I can see if it's worth the sweat

PS: I have tried Cary all-the-way (SLP05+CAD120S+306/200) with CGRs, and Sony 5400ES + ARS Sonum - with same stage sound
Please advice
Thanks
Thuan