Same here Russell, I almost bid on the 8 but decided I'd wait and go mono.
Raymo, here's a 'Flat' of mine, accentuated to highlight the details, the vignetting and dust spots aren't really that bad. If you start to get spots/marks on your images or vignetting, that's when flats are important. As my scope is very bright (F3.3) it's got some noticeable vignetting that's easily removed with some flats.
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