And posted this on SLG: https://stargazerslounge.com/topic/427185-ratchet-mechanism-for-opening-slit-in-dome/
British Astronomical Association
Supporting amateur astronomers since 1890
Supporting amateur astronomers since 1890
And posted this on SLG: https://stargazerslounge.com/topic/427185-ratchet-mechanism-for-opening-slit-in-dome/