Floor Mats: I was tired of my passenger and rear carpet mats "creeping" on me, so I added some grommets and anchors like those that come stock on the driver's side:
Added my steering wheel JDM badge a couple of weeks ago. Installs directly over the stock emblem: (The 50mm x 40 mm fit perfectly).
After a fair amount of research, I was finally able to find a genuine JDM badge that fit the front. (Spec is for a 2018/19 Accord). Once you remove the plastic cover on the front of the engine compartment, it's an easy task to insert a long screwdriver to remove (usually along with breaking the pins on the back of the emblem) the retainers holding the stock emblem. If you want, you can also drop the entire bumper, which I did when I painted my grill black, if you want to try to save the emblem. But that's lot more work.
The rear emblem is a bit smaller than stock, but no worries as it was easy to polish out any marks once I removed the adhesive from the stock emblem. (I used Goof Off, a credit card I use as a non-marring scraper and a heck of a lot of elbow grease and patience.) The emblem on the rear doesn't have any pins, so I just broke it off in pieces. I did have to cut the pins off the new emblem and I used my heat gun to heat up the adhesive prior to application.