Removal of most of the cylinders is fairly easy.
What Klaus says here is true, emphasis on the 'most'
The 2 lock cylinders, the tonneau cover cylinder and the 2 main lift cylinders ARE easily accessible, the 2 rear bow cylinders, not so much.
I am working on a pictorial DIY on removing all the cylinders for rebuild. ( PowerPoint )
You will still be able to position the top manually while the cylinders are off for rebuild.