Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

Update:
Finally back at the build table tonight, while the last 3 base feet have been reinforced and glue is drying, I wanted to make a good test of the alcohol trick to soften paper temporarily to make the folds.
  I had 2 identical spare parts and I used the same needle to scribe them, the one on left is alcohol treated and on right was dry folded.
  This is my Very first test fold and I noticed right away it took considerably less force to fold the alcohol treated paper! They both still have cracks but the alcohol treated is approx 80% better!
  The advice I got from paper forum suggested I was over scoring as well and I now believe this is true, I felt I needed a deep score as the 100# paper takes a good bit of force to fold, but now I feel with Alcohol I can use a 50% or even lighter score as the alcohol really helps. I believe with the lighter score the cracks will be 100% gone.
  I will start using this method for the rest of the build.

First test photo:

[ Guests cannot view attachments ]

Second test photo:
The new part on the far left was scribe with only 25% force of what I had been doing, I gave it about 3 fast swipes with Alcohol on back side and let alcohol soak in for 10 to 15 seconds and make fold....the alcohol is gone in under 1.5 minutes. The new test part has only 2 Tiny dots near center that the white shows thru, this is good enough for me but as I continue I am sure my technique will get better.

[ Guests cannot view attachments ]