It's all about being patient, trying as many options as it takes and keep track of the results until you find your ideal set up.
Patience is what I sorely lack nowadays :/
I blame years of failure with medical treatments for that: currently I'm going round the bend over my thyroid meds... >.>
Anyway, I'll look up the Convactec bag you mentioned tomorrow.
@Rabbit - I agree, the mechanical coupling works very well on the Convex bags. Once it clicked into place, I felt secure in it not leaking (which it didn't).
@SilentLucidity - Glad I'm not the only one who has the peeling wafer problem.
Time for me to go to bed now... <_<