The flat head slot is a great idea and you can definitely contact Crosman about your suggestion, but we cannot modify it as we did not manufacture it. A possible option to get the battery cap off would be to wrap it in some sort of rubber or electrical tape and gently take a set of small pliers to the rubber/electrical tape. But the cap should not be difficult to remove and should just unscrew with light pressure.
The scope is fog-proof, but it is only water and shock resistant.
You will need to contact the manufacturer for information on replacement parts.
We do not sell screws, but we do sell mounting rings, so you could get replacements from us if you would like. Please email us at techsales@opticsplanet.com and we can provide you with some suggestions.
The top turret is meant for elevation and this scope is meant specifically for a crossbow. Please email us at techsales@opticsplanet.com and we can help try to trouble shoot your issue.
The manufacturer does not list dimensions - pleas measure the outer diameter of your objective bell and eyepiece and compare your resuts to the sizes listed here:
Objective
https://www.opticsplanet.com/butler-creek-multi-flex-flip-open-rifle-scope-objective-lens-covers.html
Eyepiece
https://www.opticsplanet.com/butler-creek-multi-flex-flip-open-riflescope-eyepiece-lens-covers.html
If your measurement falls between sizes, Butler Creek recommends selecting the smaller of the two.
Mark H.
The reticle is pictured on this product page.
This scope has a fixed magnification of 4x, it cannot be adjusted.