Yes I decided to clean my mount finally after… 10 years!
It wasn’t that hard, I followed the guide of astrobaby (http://www.astro-baby.com/heq5-rebuild/heq5-m1.htm) and I recorded my work so to watch again to remember the process and doing it in reverse to put all together.
At the end now I have a much more smooth Right Ascension axis and hopefully I will have a better guide experience!
Soon I will do some test and measure the periodic error.
No more fear after the first time!
