Thanks Brendon, Eric.

Glad to know i am doing it correctly.

Eric i see what you mean , basically all we are aiming for is if I input a direct straight beam of light into the telescope via the focuser it should come out of exactly the same point it came from. This shows the mirrors are aligned.
So there is no need to adjust the primary mirror if i can align the secondary mirror to make the laser hit back to itself.

Also thanks for the heads up about the locking screws because i have noticed i loose collimation quite easily with my 10" dob since its continusally in transit when i go observing.
I will check to see what happens to the collimation when i shift the tube up/down.

Brendan.. I was hoping laser collimation would not pop up hahaha!
Suppose it makes sense though...to collimate properly, you need a collimated collmation tool!

More reading for me I supose.
Thanks for the advise on how to check the collimation on the laser Eric, I will definantly give this a go.

And I supose before i go pulling the secondary cell out of the 4.5" il just make a educated guess on the center of the mirror and trail error shall prevail!

Hope you got some of your answers answered as well DenMonkey

Much thanks,
Ash

PS: Thanks god for clear skies , Finally!!!!