On Thu, 15 Jul 1999 00:03:11 -0400 Chris Reuter <cgreuter at calum.csclub.uwaterloo.ca> wrote: 
>The disadvantage is that there's a size penalty (one extra instance
>variable in each morph.)

Chris,

I presume that most morphs would likely share some default value. If so, why not implement the exceptional cases as properties and limit the overhead to those morphs that actually have a non-standard requirement? See Morph>>valueOfProperty:, e.g.. 

Cheers,
Bob