Be sure you have rear-end on stand for wide base of support before lifting front-end. Especially if you're jacking up under engine... I wonder how I know that....
I like how you spaced uprights directly beneath swingarm. Strongest support with direct load-path. Adjustable stand I have has these lateral arms with lots of flex. I've dropped bike by having it not perfectly centred or on tilted tarmac.
Might just remove them and chop cross-piece to place uprights directly below swingarn like on your design.
