The prindle 18 does not have center boards - its the same shape as the prindle 16, it is also the same weight and has the same sail area as the Hobie 16 [From memory]. This may make it a boat that you should consider.

The Prindle 16 is lighter than the Hobie 16 and is a viable single hander because of this.

Did you know that the Hobie 16 has the same sail area as the original Tornado?