How it is done by professionals...

[tom3q]

Well, I don't answer this question, because I just can't foresee how many problems I will meet during my development. It's not as with fully professional development, where there is a deadline and it must be met, because a) I'm doing it in my free time, b) I don't have technical support from hardware manufacturers, so usually if I find some problem I must fix it alone.

[Louvre]

Just take your time tom, no worries