>>4464889
Yes. Converted the EF-S 10-18 to a metal mount for no real reason other than because. It adds a small but noticable amount to the total weight and weight balance of the lens, and will probably be more meaningful for balance on the 55-250. The main reason to do so is for doing video on full frame cameras because there's normally a big crop from the sensor, but really you do it because metal is nice.

So if you want to do it, undo the 4 or 5 screws holding the mount onto the barrel. They are small and the heads round easily (ask me how I know). Use a jewelry phillips head / Pozidrive of 0 or 00 size, and push reasonably firm into the screw as you turn it. Once the screws are off that's really it. Just lift the plastic mount up and sit the metal one back down. Don't scratch the lens contacts. While the mount is off the PCB is exposed so also don't be a retard and damage it. It's a simple 3 minute job if you've ever taken apart anything before.

I have noticed zero issues with focusing, exif, or any other possbile functionality.