Hi Folks
One of the items I was going to address with my laser was the issue of having the laser pointer on the Lens Tube.
Great idea unless you were wanting to swap tubes and lenses.. Or even just generic maintenance re cleaning the lens.
I saw these.. I am sure that in your country they will have someting similar.
Hope it helps someone 
I have a different, more practical type (I think).
Opinion is divided about laser pointers on machines. Some hate them, others can’t live without them - I belong to the latter category. I have them on the machines that I have had/have and use the point type. There are also cross-line lenses for this type of laser, I used that on my K40 and it worked fine too.
I have one as well.. However it fits around my Lens Tube.. so when I take off the lens tube I have to remove that as well.
The K40 does not really have a Lens Tube unless you have modded it. This is a standard setup for a laser pointer.
Interesting! Are you seeing the flexible magnetic laser pointer on (or near) the glass laser tube, or on (or near) the final mirror and the final focus lens?
I’d like to know more about the laser pointer on the lens tube and the issue you had with that.
(Edit: K40 style with no lens tube?)
Hi
It would be mounted on the gantry.. minus the laser pointers ‘control box’ which is really just a Mains 2 5 v convertor.
So I would 3d Print a ring that goes around the upper lens tube body, and have the Goose neck coming off that. Being flexible I can keep it out of the way of other moving parts (and the beam), but still point it to where the laser impacts the work.
Dave
I have 2 diode holders but still need to change the diode and adjust it again. But it’s a few times in a week, so it’s okay.
On my good old K40 I used a homemade holder for 2 line diodes, that was before I found out that there are cross-line diodes for the purpose 
IMO, that will be too flexible to keep the red dot exactly atop the laser spot.
I put the laser module in 3D printed eccentric ring for fine adjustments:
The thing works reasonably well, but I verify the dot location with a test shot before doing anything critical like Print and Cut alignments.
…does that mean you have some kind of focusing lens in your laser pointer?
I don’t have a 3D printer but I made a disc with a pinhole with the laser, which I have placed in front of the diode, it has halved the size of the visible dot.
That is a very neat design.
I might look at tryingva 3D print design, or see if OnShape has a design already.
The stock laser pointer module had the lens mounted in a threaded focusing ring, with heatshrink tubing concealing the adjustment. I slit the tubing, added that ugly yellow silicone tape as strain relief for the wire, twiddled the focus, and the spot shrank to something reasonable.
The polarizing filter dramatically reduced the intensity and left only the core of the beam, so the visible spot is now a 0.3 mm (-ish) pinpoint. When it’s properly aligned, a manual test pulse makes the red dot vanish into the hole with a puff of smoke. 
When the dot doesn’t vanish, I know I’ve done something wrong.
