Asking for a little help with Speedy West's "Rippling Waters" on C6 PSG

[Jack Kilbride]

Hey all, I am new to C6th (probably 6ish months?) and am spending this week trying to get some progress going. I decided to learn the above title. I know it is likely played on an A6th Guitar, but since I don't have one of those...

Anyway, one part that is giving me significant trouble is the D13 in the fourth measure of every A section. I am playing it at the 21st fret with pedal VI down. I bend into that double stop by pressing pedal VII and lowering my high "A" string a half step with a lever. I have tried other ways, but this seems to be the only one that makes sense, yet it feels terrible, and I cannot play it: A. In tune. B. In time. I will show what I've got so far and the original. Thanks all!

Rippling Waters - Speedy West
https://www.youtube.com/watch?v=GQg7Rnwlf4M

My attempt
https://www.youtube.com/watch?v=UcPLeqGfqas

I'm looking to improve, any feedback is appreciated!