Possibly the most common caged centrepin in general use is the J. W Young Rapidex, a highly regarded reel from a highly regarded manufacturer. What isn't commonly known, is that Grice & Young marketed several caged reels, most were fly reels, but also at least one centrepin.
Luderick fishing is simple provided you observe a few details closely. One of these details is the use of an appropriate float. A float is required to suspend a bait at the depth where the fish are feeding, it then provides a bite indicator and finally it allows time for the bait to be swallowed and for a hook to be set.
Floats come in all sizes and shapes, some people even like to use small bobby corks and eggbeaters to target luderick. I prefer to use a centrepin reel for reasons spelt out in this article. When you use a centrepin it's only natural that you use a long stemmed float. Apart from anything else, a stemmed float gives you some weight to cast when using the centrepin. Stemmed floats can also give you stability in rough water conditions and windy conditions, they drift nicely in a current and can be very visible in all conditions.