No need for heavy stainless steel heal plates. I purchased a pair of those over twenty years ago but couldn't bring myself to install them. I cut two plates out of .032 aluminum and screwed them down over the thin carpet I used, and they work great as heal plates and secure the carpet to the floor as well.
I also removed the two #3 bolts that hold the adjustable rudder pedals tube to the floor. I slid the carpet under the end fitting off the slide tube and rudder pedals. Once the carpet was in place used a soldering iron to locate the bolt holes. I replaced the #3 bolts and the end fitting also holds the carpet in place. The carpet is cut as to not interfere with the nylon sliders on the outside of the rudder pedal pivot shafts. When the carpet gets too soiled, I just replace it.
The size of my heal plates is around 6"L X 5" W.