Rarely does it work first time.
Whenever you build, modify, fix something, chances are it will not be as perfect as you imagined.
Out of the gate there will be something that is just not right, and it will bug you.
Some will ignore, some will try and fix, others will give up.
Rather than being frustrated and moving onto the next thing, a small tweak can take it from disappointing to fabulous and in some instances the delta can be quite small.
Accepting it as ‘good enough’ will render the attempt average.
The difference is your ability to keep going when others give up.