As long as you do that: know about more sophisticated modules and use them when appropriate, then I think inventing the wheel again is ok. Always keep in mind that it is a training excercise for yourself.

It's just that too many people don't know about the existing wheels. And think their wheel is the best. So we get stuck with a lot of different wheels that are more or less round. Mostly less ;-(

People who don't know history, are doomed to repeat it.

Liz