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Coffee gadgets - It's always great to learn about new gadgets. Please share your favorite hardware or full setups. It might inspire newcomers to experiment!
Local businesses - Please promote your local businesses. If you are not the owner of the business you are promoting, kindly ask the owner if it's okay. It would be great if the business has a physical store to include an exterior or interior shot.
Using my fast coffee scale for cocktail creation is efficient and eliminates the need to wash my jigger. I round to 30ml for one jigger and 15 for a half. This is easy to remember as those are the volumes of a standard espresso shot and a ristretto respectively.
Cheers! 
Correct, you need to calibrate with the desired liquid. One jigger of 80 proof spirit is about 30g for me. There is quite a bit of variance across jiggers though. Also this method is more accurate as you never really fill the jigger completely or you'll make a mess and the degree of unfilled volume varies a bit pour to pour. When in doubt with spirits, always round up!