tag:blogger.com,1999:blog-2807403883562053852.post668935358460282013..comments2024-03-27T08:40:31.785-06:00Comments on Clayton Cramer.: Focuser Knobs Clayton Cramerhttp://www.blogger.com/profile/03258083387204776812noreply@blogger.comBlogger1125tag:blogger.com,1999:blog-2807403883562053852.post-73328679956031633452021-03-19T14:41:28.506-06:002021-03-19T14:41:28.506-06:00If the concept of lightening holes is sound, then ...If the concept of lightening holes is sound, then maybe drilling them with a Forstner bit from the hidden side without breaking through would work.<br />Or drilling all the way through with the disk clamped to a sacrificial backing board. <br /> John in Phillyhttps://www.blogger.com/profile/16196033252818387245noreply@blogger.com