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O couple of things to keep in mind...

Fast scopes ( low F# ) are very difficult to figure, so your average commercial F4 is going to be a fairly crude mirror, good for low power sweeping and with a VERY good mount, astrophotography. Collimation is going to be a rip-snorter, especially for newbies.

I haven't seen any reccomendations to "roll your own". Here's one. Your first mirror, with a bit of patience, is going to be an order of magnitude better than popularly priced commercial mirrors. You can make a nice 8" dob using excellent parts (something commercial scopes seldom have) for a couple hundred dollars. With a bit of patience, a first mirror can fairly easily be 1/10th wave, most commercial stuff tests out at 1/2 to 1/4 wave and a lot of us have tested mirrors for unhappy owners with over 1 wavelenght of error.

Here it comes, make yourself a nice little 6"F8 or 8"F7 dob, easy to make, easy to use, both will fulfill a lifetime of viewing.
Rodg in Bellevue
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