you can make your own collimator from a plastic cylinder (such as old film canister -which are harder to find)
other thing you can do is place a wanted Ad for a used 3-5mm plossl -unscrew the ep & remove the glass -makes a great little sight tube
you could always get a bigger scope but if you're looking to start out the 5" is quick, easy & small -it will hopefully get you hooked
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