I am not familiar with the pseudo-chicken you mention Sverige. I've never seen it in our grocery aisles.
Having never been any where near an actual British Indian Restaurant, as in located in Britain, I'm not able to compare my output with the standard you mention George. It doesn't sound great though, so mine may well be pretty good after all.
I will try the diagonal cuts next time around with lower degree of cooking to see if there is any discernable improvement. I'm quite happy to eat the dark meat and actually prefer it in some cooking, but the main dish I've been tryng to emulate is for people who prefer white. Life is full of little challenges.
It's funny how things have changed. When I was a University student 40 years ago living in shared digs, chicken generally, and breast fillet in particular, was only rarely affordable on our low income budget. Today it is the cheapest of all meats. Breast was always more expensive than thigh but recently this is often reversed.