Hi. Firstly, if you are happy with the views, that is good, but good collimation will usually improve the view. Mind you there are limits that are largely dependant upon the size and speed of the scope.
I have a 5.25" f7 newt that gives pretty much the same views when a bit out of alignment as when I have spent some time getting it just right.
A smaller/slower scope is more tolerant than a larger/faster one.
Having said that it is a good habit to get into to check the cillimation each time you use the scope. That way you know you are getting the best view possible.
Malcolm
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