Looks like Robos bee vac and cutout shim
boy I love Robos Vac
Thanks for sharing the photos
Yes, it's a Robo bee vac, I made myself a couple of them. It came in very handy on this job because the bees at the end of the job, when all the comb was removed, clustered in the middle of the chiney chase where I couldn't reach them by hand, but I was able to get to them with the vacuum. (Thanks for posting the design Rob).
Also, I have found it's handy to have multiple cutout shims for times when I have had jobs go into multiple days and end up with more than one box of vacuumed bees to combine. I put the extra shim without
a screen in it between the bottom and the boxes, and just wait for the bees to move up into the frames and slide the screen in. That way I can add the 2nd box of vacuumed bees above the brood. A guys just got to remember to pull out the shims after a couple of days.