I am a big fan of the two-piece even though my Ostomy Nurse said "Oh, you won't want those. Two pieces are a pain" ha! The one-piece are the pain and are actually 4 pieces that leave more chance for issues when lining up all the pieces.
You say disposable liners. Are you saying you use a closed two-piece pouch? I have some of those from Convetec but I am always in a hurry to empty my pouch when even a little is in it, I would go through so many a day! Lol! I do not mind the drainable pouch except it is bigger than the closed-end ones!
I have a Coloplast two-piece sample pouch on the way to try! I liked their one-piece pouch that I had to cut. The pre-cut ones were not a good fit and I do not mind cutting them. Better than molding them.
I am trying to irrigate so I do have to change the flange about every 4 to 6 days because of the splashback of water when I irrigate. It goes under the barrier some and by the 6th day, it is all gooey!
Puppyluv