Quote - Cheers Mate. That 'select by similar' is a real time saver. I wonder what the alogarythm for that is.

Thanks.  It's one function which has almost entirely changed the way I work, since I began utilizing it.  Blender 2.7 (introduced I think in 2.6) also supports a Select Similar function (Shift G), although it requires you to choose from one of several algorithms in a menu first.  The "area" option seemed to work fine in order to follow this tutorial with Blender.  3dsmax also has several sub-parameters to the feature, which can be enabled or disabled to increase or decrease the probability of the selection, based on the characteristics of your current selection  (I talk about some of that in this video).  The ability to have multiple criteria combinations permanently enabled in the tool helps to speed up the workflow dramatically.

Most of today's advanced modeling packages support some type of "similar selection" routine.  It's first appearance, I believe, was in a open-source, high-genus modeling application called Topmod, back in 2005.  The feature has been available in 3dsmax since 2010, and has become available in Maya as of the 2014 release (see here).  I think Modo can do it through an addon script, if not natively.  I'm fairly surprised to learn that C4D has yet to support this kind of selection behavior natively.

It doesn't completely eliminate the need to model with radial symmetry, but it cuts down on the number of circumstances where you might need to do that.  In this case, I felt using radial symmetry would have been a little more laborious and time consuming, considering the simplicity of the surface, and our simple needs to edit it.

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