This is what I made, I used 4 round headed screws so there would be no sharp edges, I put a end piece on so it would ride on a smooth area all the time, you have to fit the laser collimator to your laser, I had to take the end piece off to do the other laser.
Another trick was to only turn it half a turn back and forth, then I could see the "U" shape it made on the news paper I was using that was 19 inches away and I could see what letter it needed to be on to be centered, it took me over 20 minutes to get it done, but when I rolled it the rice shaped laser dot spun on the letter "C" that was center(the word was school), I was able to spin it smoothly 360 degrees when I was done as by that time I was used to spinning it.
You can see mine is clamped to my counter and that base does not move, yes it jumped around several times and I just started over, whenever the dot was centered at the bottom of the "U" I stopped and tightened up the top screw after loosening a quarter turn the other 2 screws, the closer I got the less I loosened the 2 screws the tighter I tightened the top screw.
The first time it took over a half hour and I stated that it was pure luck I got it as there was no rhyme or reason(pattern) on what the screws did, this second laser there was a process that made sense, make the "U" in the news print, find the center of the "U", center the laser dot in the bottom of the "U", tighten the top screw and watch the laser dot rise until centered, then lightly tighten the other 2 screws then see if it moved out of center, repeat until you get it.
Once you get it close, then if you want to take the chance do it the 15 feet you mentioned, but keep in mind that I regretted loosening the screw on the first laser I did that took over a half hour to collimate, at the time I thought it was not off enough to go thru all this and I wondered if I will ever get it back to where it was let alone centered, that was one of them cheap $25.00 Svbony lasers.
It will not let me do a 3rd photo, see next post.
Edited by Waynosworld, 07 December 2020 - 01:32 AM.