Gave it a think. If the chainline is designed around a 142mm rear hub and you have a 145mm one it's only a 1,5mm each side extra. So you'd want 50,3mm chainline to have it perfect. FD should be able to go 1'5mm extra out without too much drama.
Apologies – I forgot to respond when you first replied. This is tremendously helpful, thanks. The parts will be ordered soon and I'll report back in the new year.
Gave it a think. If the chainline is designed around a 142mm rear hub and you have a 145mm one it's only a 1,5mm each side extra. So you'd want 50,3mm chainline to have it perfect. FD should be able to go 1'5mm extra out without too much drama.