A seat stop is a good idea. I have this one:
AEROSTOP SEAT LOCKS from Aircraft Spruce
Effective, simple and doesn't hurt the seat track like the thumbscrew types. No holes to drill that weaken the seat track, either. Makes no difference, but I know the folks who make it. Good folks.
The Cessna one may be free, but free isn't always the best option depending on one's own requirements. Just another option to consider.