@jakedduck1 I heard about the restorex device about 6 weeks after RP and used it for about 12 mos. In hindsight, the explanation that the penis is traumatized and the device serves to maintain smooth muscle conditioning during the time it is avoiding further stress seems reasonable. Now out about 16 mos, I only use the device to assist me in administering shots, as the pills have not worked and had unpleasant side effects.
A family member talked about the "loss of length" before I had the RP, but at this point I do not think the loss of length is noticeable. I think there is a loss of engorgement, even with the shot, and perhaps it would be worse if I hadn't used the restorex device while the nerves (and autonomic brain) were recovering.
In any case, out about 16 months, generally my penis looks more like I remember it most of the time, but it still does shrink up under "trauma" or trauma trigger conditions, which include wet cold, chafing, and extended compression--aka swimming, hiking, biking :-).
[Physically, if a typical penis is 14 cm when erect and the loss of length is >1 cm, that is >7%, e.g. insignificant unless you're measuring meticulously, which is probably never a good idea apart from clinical research.]