Welcome Curt, Dale, and Katie!
I've never tried a one-piece system for the same reason as OHIO. My wafer lasts 6+ days, and I'm ready for a new pouch after 3-4 days.
I use the Coloplast Assura Extended Wear wafer #2833 with cloth covered pouch #13986. It's the same system my ostomy nurse recommended in the hospital over 4 years ago, and I've only had one leak (which was my fault, because I was trying to push it one more day! ;)
If Coloplast has a one-piece with an Extended Wear wafer, I would give that a try!
Dx'd Crohn's in '99 at age 28. Proctocolectomy and permanent ileostomy in '06.
Disease-free and medicine-free since surgery and very thankful to be healthy again.