Tool mount for Makita RT0700C on Burly F 25mm. I am confused

Oh, I like that! I just did a similar search, didn’t find this clamp and wasn’t completely happy with the one I built. I much prefer the places you’ve chosen for attachments. It also looks like you’ve tucked the vertical tube in tighter to the central assembly - does it hit the front roller?

Also, what is the keyhole shaped piece in the shoe for? Is it specific to the Makita router?