I tried the suction cup type rails initially, but they didn't stay in place. Then we learned that there was a man who would drill the holes and install the bars wherever we wanted then for less than $100. We put a vertical bar at the step into the shower which I use everytime. It is very sturdy. We also put long horizonal bar at the back of the shower to grab incase I slip. Have you called medical supply store to see if they can recommend someone to install grab bars?