Hi, I am about to glue my rudders in on my V3 and I keep looking at those small pin hinges and tend to agree with you.  I honestly think that they will be ok as there are not tremendous forces on the rudders.  However, this is a jet and even though it is not a speed demon, I fell better going that one step further if possible.  I am going to use regular Robart Hinges on mine if they look like they will fit ok.  If you want, I can let you know what I think after trying it.</p>