You're very welcome, and I hope you continue to find the forums helpful.
As research into bird care has increased, we have been made aware of numerous things.
Parrots (which include budgies), as hookbills, husk their seeds and therefore have no need of grit or gravel to eat like some other birds do. In fact, if they do ingest any grit or sand, it has been proven to erode away at the crop and gizzard, causing inflammation, infection, and discomfort.
Additionally, the sandpaper covering on the perch covers has been found to conclusively contribute to a painful condition called bumble foot, where the bird's feet erupt in pressure sores. This is caused by the wearing away of the delicate foot skin by the abrasive sand.
If a bird chews on the sandpaper as well, the glue as well as the sand can be harmful.
These things are valid health concerns that if not addressed can cause your budgie much discomfort! As birds become more popular as pets, veterinarians are always looking for better ways to take care of our avian friends.
As for drinking out of the faucet, there's no problem with that
I will say that you should never, ever take your budgie outside without a cage
. It doesn't matter if you've done it before and been lucky with not having your bird blown away, spooked, attacked, etc. Budgies are very small, and usually unsuited to living in the wild should they get lost. Additionally, even if they are the most loyal of creatures, they cannot control if they are swept off by a gust of wind or snatched up in an instant by a hawk.
We aren't trying to tell you that you need to go to extreme lengths to care for your budgie. This is simply the best way to care for your bird and ensure that the chance of health problems or injury is minimized; isn't that the least you could do for a little creature who trusts you to care for him or her?
I'm glad to hear you'll be taking this new information into account when caring for your little one!
Feel free to start with these links!