Pressing flowers normally requires weeks, but this easy-to-use device dries and presses flowers in minutes using a standard microwave oven
Maybe there is someone with a need for pressed flowers, NOW!!!! But that is not the point of pressing flowers. It is the act of picking the right flower, finding a good book to place it in and, if you are lucky, forgetting about it. Then, years later, opening the book and seeing a prefectly preserved flower.
I have found it helpful to do the stretching exercises my physical therapist recommends. Do some core strengthening exercises, such as the ones highlighted at The Mayo Clinic. By keeping your core strong, your back won't put itself in a position to cause that sciatica pain you are having.