I’ve given this pic another look, @toddumptious …
I’m …concerned … that the Walker looks somewhat smaller than usual in comparison to the ExoSuit size… 
I’m imagining the Walker being “behind” the ExoSuit, whilst the Exo is coming down from a high Jetpack Jump . . . and the timing of the pic was “perfect” (or, in Photo mode, everything being “paused”, the camera was positioned just so – creating a look of perfection. 
(Links)
For comparative reference:
Sentinel Surfing - a "sport"? Your pix! - #2 by Xion4012
… and …
Sentinel Surfing - a "sport"? Your pix! - #31 by SingularGleam
Unless I’ve completely missed out on the addition, in NEXT, of an “in-between” category Sentinel – Mini-Walker, smaller than Walker, and bigger than Quadra …?
[edit] - tidying only; still in AWE of @toddumptious’ ‘image manipulation’ – very convincing! [/edit]