Astronomyshed is the place to go !! Thanks for the links. I dont think I will strip anything after bad experience with my mount. So I'll start with resetting the spider. Following astro-baby's guide, I'll make a circular sheet, put a hole to it and check spider position. I agree collimation is not as bad as it seems. I have had good experience collimating my XT8. Its just this sideways shift of secondary that got me worried. Infact, despite this problem I can do the rest of the process to get exactly the view through the collimation cap as shown in this image by astro-baby. ( Mel, I hope its okay to use the image for this purpose.)