You seem to be doing fine without me on this thread, its just I always get worried when men talk of stretching by retracting, (it was by excessive retraction almost like stretching the foreskin backwards that I caused myself penis fracture).
The foreskin should be strecthed by repeatedly moving it over the coronal ridge of the glans. ... But with a not too tight ring the coronal ridge does not provide an adequate circumference to stretch over - so you need to get a couple of fingers into the foreskin and stretch with them. In the bath in a shower, steam heat all seem to help - use of betamethasone is another helpful option - otherwise good luck and cheers