Hello Sprocket. Your English is just fine. Please feel welcome. We enjoy hearing from all neighbors and quilting friends.
I concur...4.5 is close enough. I break the rules all the time.
When I first began learning, quilting more densely than that was more than I could commit to. Years later, I have gone back and filled in on some of my oldest ones in order to reinforce them as they aged. It is Ok to do what you can and learn as you go. Have fun!