maybe worth a go at trying to mod the andrews. need some 1.25" inside diameter to 1.25" outside diameter plumbing pipe.. which i belive does exist. Remove the crosshairs from the original andrews cheshire.. and re-cross hair the pipe using
this template from star ware. That way you can make sure u make the right length cheshire for you scope, using this from Nilfs Olof Carlin.
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Find a piece of plastic or other suitable tubing that fits your focuser snugly without wobbling easily (I have used PVC tubing for electrical conduits and for drains, and aluminum tubes from old vacuum cleaners). Make a peephole cap from any material that you can make a nice hole in, that can be cemented to the tube end and is reasonably dark. Make a hole about 1 mm, centered as well as you can (if you find it too small, you can make it a little larger later). The length of the tube should be the inner diameter times the focal ratio: I have a tube with 28 mm inner diameter for my f/5.6 telescope, so I cut it to 28*5.6 = 157 mm length.
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so with a couple of bucks worth of pipe you could get turn your andrews cheshire into a full working combo sight/cheshire for you scope. Total cost.. under $40 plus i'd say a couple of hours if you really took ur time. A good way to get through a cloudy night.
el
