I can see no reason why it shouldn’t fit. I did move ours further outboard than shown in the photo to put more weight on the corner rather than the end and as our backstay adjuster exited between the rails to the attachment point near the waterline I had to leave a gap between the bottom of the frame and the pushpit. It looks like you could get yours fitted closer and carry the weight better.

Somewhere I have some photos of the frame and brackets I made when I moved it further out to the corner, if I find where I have stored them I will try and remember to bring them to the Reading bash on Saturday.

Cheers
Paul.