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I literally set those lenses in 30 seconds, they are roughly 1.25 inches apart and the 1st lens the concave cyl was about 1/2 inch from the G2 lens, I set both hot so you can see the bar stretch to over 2 feet wide at 15 feet when you set that concave cyl, just center that line, center the lens, center everything LOL.
You can see the beam inprint on the lens making it easy to center, any rotation will produce skew but squaring it up is obvious too.
When you center your concave cyl then set your convex you will see as you move it what it needs, typically I set the concave as close to the lens as I can within reason something like 1/4 to 1/2 an inch and you will see the bar/spot is now over 2 feet wide at the 15 foot away target, again center it same point as before, everything centers on that same point where you start.
Next the convex, you will know when it's right by watching your spot, it should center the same place as you set each lens, if not you will notice some skew. As you move it shortening or lengthening the distsnce between the lenses yos will see that bar go from wide to tight, stop when tight, centered and squared. Rotate your lens to square the bar ( remove skew ) also the print you see on the lens should be centered from left to right.
These were very easy to use so you can experiment easily, as you know always wear those laser safety glasses and have fun.
p.s. I did NOT glue anything down, the lenses were just sitting in a clamp on channel I made to fit 1.5 inch wide heat sinks.
![SANY3296.JPG SANY3296.JPG](https://laserpointerforums.com/data/attachments/45/45965-cce9336e996ad96deb193ee39a4f7a63.jpg?hash=zOkzbplq2W)