Now when I almost finished the focuser project to my TS130 APO refractor there are a lot of small upgrades to do on the refractor and its peripherals. There are: Mechanical, USB hub, brackets, DC/DC converter etc. They all can be more practical, smaller and more energy efficient. To my help I have the 3D-printer.
Here is my documentation of what I'm doing:
http://www.astrofriend.eu/astronomy/...0-upgrade.html
I soon hope that I can get the telescope up on the mount with a clear sky.
Lars