that you can do when you build your object : name a face! (or style color)
Construct your object

So when your object is finished it's very easy to select element by color, name...

other thing : put a diagonal on each different faces
so with script: /* Select by Length */ var min = 1.0, max = 5.0; var crvs = moi.geometryDatabase.getObjects().getCurves(); for ( var i = 0; i < crvs.length; ++i ) { var crv = crvs.item(i); var len = crv.getLength(); if ( len>= min && len <= max ) { crv.selected = true; } }

it's very easy to select each faces concerned...you will be very unlucky if diagonal are sames measures from different faces! :)

etc...