Everyone asks me why I don’t have one of those top door thingy’s. I dunno. Mine never came with one and I never got around to ordering one. Maybe someday..
I have one, not on my airplane, but I have it stored in a box. It wasn’t installed 30 years ago when I bought the airplane. I swore I was going to install it when I rebuilt the strut, forgot, both times I rebuilt the strut. I swore I was going to install it when I replaced the tire, forgot for three tire replacements now. :-)