Collimating Mk67 MCT: Adjust Secondary or Primary?

I am new to Maks but have a lot of experience collimating fast newtonians and SCT's. I note that the Intes Mk67 (same as Orion Argonaut MCT)permits adjustment of the primary as well as the secondary. When should I adjust the primary? I am accumstomed to tweeking the secondary on compound designs until the out-of-focus star image is concentric on either side of focus.

Should I refrain from adjusting the primary and adjust only the secondary? When will I know that the primary needs adjustment?

I've researched the collimation narratives on the web. The one at geekjoy is written in a highly confusing manner, and as a consequence is not very useful. I'd be most grateful if one of the more experienced Mak users on this board could set me straight in a clear,unambiguous manner.

Thank You,
Rob Mackie

Rob
You can email me if you would like to talk on a land line and I can help you but I don't want to write out a long and possibly difficult to understand explanation.

Mark

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