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The Jet is supposed to move south in the summer months so you might get a reprieve from the onslaught.
I used adhesive backed velvet from Spot light (haberdashery store) and it cost 25 dollars for a 1.3m x0.9 metre piece.
Jase, as someone who is doing planetary imaging all the time, I can say I tried collimation with the imaging train in place early on (3years ago) and never went back to it. It assumes that the chip is square to optical line and you need to use stars that are very bright. You also need to defocus too far to get reasonable results. Tight collimation needs to be performed on low mag stars and only slightly defocusing and then looking at the airy disk and I can thoroughly attest that using the optical method works better than using a chip method. My results speak for themselves.
The chip method is fine for DSO imaging but you need to be more accurate for planetary imaging.
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