Can you get permanent gains with pumping?

Just started out myself currently only using the bathmate and some stretching exercises. My routine started off with 3sets 5min each with no erection. Noticed my penis was slightly thicker but not by much and the effect wouldn’t last very long I wasn’t doing a warm up or warm down I know now that’s not a good idea didn’t feel very much pressure with no hard on. After about 3days decided to see if I can go in with about 50% erection same routine and noticed slightly better girth that would stay around longer . This got me excited and decided to go in fully erect same routine this was a bad idea no warm up or warm down and penis wasn’t ready for that and I managed to bruise some veins or nerves on my shaft and more noticeable pain on my pelvic area like a pinched nerve . Didn’t notice damage to the following day but that night right after, I had sex with the wife and she noticed that it was different and she finished in half the time it normally takes her. She said she could feel all the veins and it felt hotter and pulsing, throbbing and more of a stretch in her I noticed a tighter good feeling as well. Next day of course in the morning noticed the pain and saw dark little bruise and decided to let it heal took about 3days but I waited 5 before using it again this time with a 5min warm up and reduce time in the routine 3sets of 2 minutes full erection worked well no pain next day added a minute no pain and so on till right now routine 3sets of 5min full erection about a minute rub down before going back in after each set I feel sore the morning a good sore and my flaccid state is much Fuller throughout the day after about 3days I need a day off so that the soreness doesn’t become pain and I don’t bruise again.

My erection girth a few months ago would only get 4.5 and erection quality was low after getting on a low dose one a day Cialis I noticed slight girth increase maybe do to better blood flow got me up to around 4.7 much Fuller and all around better erection. Now with bathmate I can get up to 5.0 I don’t believe this to be permanent gains but it’s definitely keeping wife happy even on my rest days I can get that 5.0 girth I do try and keep my penis stimulated and as full as possible throughout the day my job allows me the Privacy to do this so I’ve been performing sets of edging. Had a question about rest days should I not purposely go into erect state and try to keep that pump should I just let it completely rest ?

I’ll throw in some anecdotal evidence from my own experiences with the bathmate.

Average 4 times a week, 30m session in hot bath, for 10 months

Gains after use were
0-.2 inches length
.5-1.5 inches girth

This lasted for 6-12 hours on average. Afterwords I would maintain 50% of that for 24-48.

I stopped and about 6months later I feel smaller on average, though that might be placebo. I’m looking to get an air pump to try it out next.