Some cool information there.
thanks, Fred!
-Sean

Over time we find lots of interesting resource material and post it into individual threads. Some of them eventually get pushed down the list and hard to find. I am trying to organize such posts into one forum - this one!

College of RR Knowledge for Model RRers: http://www.hosam.com

Convert Drills Between MM and Inch: http://webpages.charter.net/sinkwich/sdventure/html/sd_drill_index.htm

DECALS
Here are good how-to articles about preserving/repairing old decals, or making your own.

More on Using or Restoring Old Decals

Save Those Old or Yellowing Plastic Model Decals
Kadee
Rail Graphics
Testors decals sets: http://model-railroad-hobbyist.com/node/10186
Custom Decal Makers

Others
http://www.bedlamcreations.com/index2.htm

Freight Car
Freight Car Draft Arrangements (couplers): http://techinfo.wabtec.com/datafiles/leaflets/tp-2009.pdf
Interlocking Diagrams: http://members.trainorders.com/nkp759/towerindex.html#Ivanhoe

RAILROAD REPORTING MARKS - PAST & PRESENT: http://www.pwrr.org/rrm

Steam Locomotive Controls: The Backhead: https://modelrailroading.wordpress.com/2009/09/08/steam-locomotive-controls-the-backhead

Track
German: https://www.hosentraeger-spur1.de/index.php/der-reichsbahnoberbau