Your photos are terrific. I've put you on my facebook, and tweeted you. But, you'll need to get, and keep, your shop out there in front of etsy customers. You can join 1, or more, teams to post your shop (and pictures). On etsy, you can promote, your shop too. But, I recommend you specify the budget to be $1 to $2, where it's specified. Otherwise, it can get expensive. There's also a place on etsy where you can sign up on apps of your choices. Most, you can sign up for a free trial, or free. But, will start costing you $5, or more, for their services. So beware. You know your budget best. And, your time. Good luck with both your shop and engineering.
