Höfner H510B Diamond Pickup

I have recently bought a special edition Hofner Ignition cavern bass and wanted to upgrade the pickups. I looked at all sort of pickups and at times was overwhelmed with variety of information about them. They were all so costly. I found pickup rings on ebay that accepts the diamond pickups. At the end, these pickups are relatively inexpensive, they look, feel, sound and most importantly they are made in Germany.