I certainly do not try and trivialise the matter of stretching the frænulum, it is quite a
difficult matter, but do-able.
I perceive from both your posts that you
have had considerable improvement in retraction over this time. If you have not achieved your overall goal, then I would again suggest you need to persist with
both exercises, the specific frænulum stretch that we illustrate so often, and the "widening" manoeuvre.
My questions are: You mentioned about five minutes twice a day. Are you still doing
at least this much on a regular basis, or somewhat more?
How far back can you
easily retract the foreskin now when flaccid?
I trust you are less anxious, given my previous explanation, about whether intercourse would be a problem and presumably this is still not an immediate consideration. I wonder whether you have noticed any difference in what happens when you masturbate?

The only other method I can think of in regard to the frænulum, would be a variant of the "T-tape" method used to stretch the foreskin remnant to "restore" a foreskin following circumcision. As it applies to you, you would identify the point on the foreskin where the frænulum ends, and apply a piece of adhesive tape folded back on itself so that one end was inside the foreskin over the end of the frænulum and the other on the corresponding part of the outside of the frænulum.
In effect, the tape would be holding on the two points we suggest you grip in our "
favourite illustration", but you can attach to the part of the tape folded on itself, a clip attached to an elastic strap, the other end of which you attach wherever you can (some suggestions including a loop around the leg under the knee, or a strap over your shoulder or around your neck!) to provide
constant albeit gentle tension.
In fact (and somewhat contrary to Jim's comments), I see no need at all to hold the penis in order to provide "counter-traction". Whether or not it would be a good thing, there is negligible likelihood of such tugging tending to elongate your penis!

That is made of immensely tougher material than the frænulum, and using one hand only makes the process far simpler/ easier.
I think you can see if not in that picture, then in
this one, the point of grip at the end of the frænulum.