Hello jalrein.
When I first had a stoma I used to have a lot of trouble with wafer-adhesion and some bags wouldn't even last the day! The number of accidents/incidents was just too much for me to carry on like that, so I began making and developing my own baseplates.
The best of these have evolved into a simple 7x10cm piece of upvc skirting with bevelled edges to stop chafing, with a 3.5cm waste pipe (to create the hole) 2.2cm long (to accommodate a 90% detachable bend which guides the output away from the stoma and into the bag/sleeve).
The devices are held on by two belts (to suit my needs) and kept in place with a medical adhesive (which used to be 7730 but now I'm using Probond). The manufacturers devices are stuck onto these baseplates and they last for months.
My preference has changed over the years since I have been irrigating, so I now use a Coloplast two-piece system that will take both irrigation sleeves and bags.
I realise that there won't be many people who want to or have the skills to make their own baseplates. However, I thought I would just add my contribution to this conversation as an alternative perspective.
Best wishes
Bill
PS: Upon re-reading my reply to this post I feel that I must clarify one aspect of my contribution. In my routine, the bags/sleeves etc last for months. However, I take the whole thing off everyday to clean the area around the stoma and have a bath. So, there is a sense in which I change everyday, it's just that I put the same devices back on after doing so. I hope that makes things clearer.
Best wishes
Bill