coffeegirl

Is it customary to add a tip for your long armer? When I first started quilting and sending tops out to be quilted, I just paid whatever the bill was and never thought anything about it. But over time, I started adding a tip, especially if they did a great job, or maybe finished it under a deadline, etc. Now, I feel bad if I Don't add extra. What does everyone else do? The quilting can be pretty expensive already, am I making it worse by paying more than is necessary, or is a tip appropriate and maybe even expected? Thank you for the advice!