Now that I have your attention...
I see postings about draft doors that are loose and don't seal. Seems like it's usually the Small, and sometimes the Large (providing you don't use a screen) that are mentioned!
Rather than hammering the channels down
...just apply a few strips of gasket material (as shown above
)...at you're good to go!!
It'll last you a year or so, does a better job of sealing the bottom off,...and looks much better to boot!!
PS...Oh yea, it's real cheeep too!
I spent most of my money on good bourbon, and bad women...the rest, I just wasted!!