I came across a product called BONDIC
It is a liquid plastic that you apply with the needle applicator and then the other end of the applicator is a UV LED, shine the UV light on the liquid and it cures in 3 seconds, Just like the dentist uses to fill cavities. You can make threaded parts, repar and use it as a glue...
You guys may find it very hady as there is no need to wait for hours while conventional cement cures.
I took 2 aluminium laser heads and bonded them together using this product and it is rock solid and I was able to test the laser head on the machine at full speed in just seconds...
If you need more details, PM Me.
Cheers!