Here are three tutorials that offer tips and tricks to help you successfully sew elastic waistbands.
Guest Maker: Bri's Elastic Waist Ella Hacks - Forget-me-not Patterns
How to Sew and Topstitch an Elastic Waistband » Helen's Closet
How to Replace an Elastic Waistband : 6 Steps (with Pictures
How To Choose Sewing Elastics, Sewing Elastic Guide
Tutorial/Video: Sewing elastic into waist tunnel casing in ONE
Starry Sky Skirt / Waistband Tutorial — Making Co
Attach elastic to a waistband – no casing or twisting! - Cucicucicoo
How to Sew an Elastic Waistband on Bluprint
A better elastic waistband finish – tutorial – FehrTrade
Sewing an Elastic Waistband - Threads
Tutorial on 3 Tiered Skirts Making