https://www.cloudynights.com/topic/475845-low-profile-printed-crayford-focuser/
https://sites.google.com/site/wikitelescoperostrg/home/arana-sencilla
http://www.jerryoltion.com/boxycrayfords.htm
http://blog.gerardprins.com/blog2.php/2016/07/20/diy-heavy-duty-crayford-type
http://eldiariodeuntelescopio.blogspot.com/2015/04/
http://www.scopemaking.net/dobson/finish.htm
http://garyseronik.com/a-simple-double-plate-mirror-cell-for-your-reflector/#more-24
https://garyseronik.com/telescope-making-diary-week-4/
https://garyseronik.com/a-beginners-guide-to-collimation/
https://www.catseyecollimation.com/designie5.html
https://stellafane.org/tm/newt-web/newt-web.html
https://garyseronik.com/a-beginners-guide-to-collimation/
https://garyseronik.com/category/my-telescopes/
http://construiruntelescopio.blogspot.com/search/label/montura
http://www.cielosur.com/colimadiego.php
http://construiruntelescopio.blogspot.com/
http://www.astrosurf.com/patricio/tecnicas/cheshire.htm
http://www.deepskywatch.com/Articles/replace-offset-collimate-secondary.html
http://web.telia.com/~u41105032/kolli/kolli.html
http://www.stellarscout.com/blog/colimacion-de-reflectores/
http://www.deepskywatch.com/Articles/replace-offset-collimate-secondary.html
http://davetrott.com/telescope-projects/how-to-build-the-perfect-telescope/
https://www.cloudynights.com/articles/cat/articles/how-to/using-a-multiple-aperture-mask-r536
http://www.rfroyce.com/Telescope Bulding Projects.htm
http://homemadeastronomy.com/10-inch_split_ring.html
https://www.cloudynights.com/topic/160235-how-do-i-build-a-focuser-out-of-pvcabs/
http://jeffreysboldlygoingnowhere.com/journal/first-light-absdbs-8/
https://www.cloudynights.com/topic/495237-new-helical-crayford-focuser-thats-cooking-with-gas/
https://sites.google.com/site/8inchdobsonian/
https://www.stlfinder.com/3dmodels/focuser
https://www.cloudynights.com/topic/27908-homemade-crayford/
https://www.cloudynights.com/topic/559990-homage-to-homemade-crayford-focusers/page-3
http://www.cielosur.com/construccion.php
Estructuras
Trusstube
https://www.grattavetro.it/traliccio-del-telescopio-dobson-e-dintorni/?lang=es