John Montroll - Sunken Icosahedron

[Morgan]

Ive been trying to fold the sunken icosahedron from John Montroll's Plethora of Polyhedra. I am having troubles with steps 28-32...and in particular step 32 where you want to tuck in, or fold over a portion like step 20, but this is at a point in the formation that the figure becomes "formed" and i have a really hard time getting that paper under the flap it needs to go under.

Any tips on how to get it under there? ive been kind of trying to open it and shove it in, but it just will not cooperate.

Thank you and hope to hear from ya'll soon!

[Brimstone]

That's the most complex and nicest model from that book. I remember having trouble at those same steps and the cause was from a previous step, I was trying to do something at the wrong area of the paper.

Go back to step 21 and make sure you follow the instructions very carefully. Count the stripes and make sure that you do what you are told to do at the right stripe.

The tucking in at step 32 is not that difficult, but it is not easy either. You actually have to unfold the model a bit. Make sure you folded the small triangle from step 31, then you make that valley fold that's indicated in step 32 and then kind of "close" the whole model.

I know it sounds complicated but it is not that much.

Once you've folded I'd like to see the result. Here's mine, the model did not hold together that well so I had to press it with my fingers to keep it in shape:

[Morgan]

Hi, thanks for lookin at the post. The tucking in part is SO HARD for me, haha. Also i may need to at some point make a cp for this and pre crease the whole thing to make it nice... kinda hard to make sure the triangles are folded properly too, that is one big part of my flaw. anyway, here is my rendition:


DSC00031 by morgansolt, on Flickr

mine holds together....ok i guess, its all about getting precise folds and making sure all the "locking" folds are accurate.