On the bright side, you can expect your clone to actually not be a clone.

When initial product you want to clone was made, its makers had to solve a lot of problems and made choices, which are not documented anywhere. You will face some of those problems and may make different choices, even have new ideas to solve them. Ultimately, your product will have its own DNA and strengths, most likely.

There's a say I really like in the world of music composition : don't be afraid to copy your favorite composers, you won't do the same thing anyway.