Already stated on the forum somewhere that I'm ripped and muscular (visible, defined abs, visible defined back muscles etc) but I could do with another 10-20 pounds of lean mass. Finding it hard to put it on. Probably due to free testosterone levels being at the lower end of the range (my SHBG is insanely high).
Perhaps we have different interpretations of ripped and muscular. No, I don't consider myself "ripped and muscular." You said you were 5'8" and weighed 130 pounds. I'm short, just under 5'4", say 5'3.5". And I weigh just over 130 pounds. Last year, the InBody scale measured me at 13.2% body fat. My frame, according to wrist and elbow measurements, is on the border of small and medium.
At what was probably my peak, in the '90s, I actually hit 150 pounds. But it was for a very brief period of time. Either not long before or soon after (I don't remember exactly), when I weighed in the mid-140s, my gym estimated my body fat at 7%. (This was the Dunfield Club on Eglinton, just east of Yonge in Toronto, if anyone here is familiar with it.) This was with calipers, so I know it was only a rough estimate at best. But I had an impressive 6-pack, better than what I have now, and I was asked very occasionally if I was on steroids. Admittedly, the people who asked didn't really know what they were talking about, since if I stood next to an actual steroid user, I'd look like a "before" picture. But compared to anyone with an average build, I would have made a pretty good "after" photo. I will admit that I was into fairly high volume for someone who didn't do drugs. I worked out 3 times a week with an ABA routine, and I did as much as 12 sets for larger muscle groups, so that averaged 18 per week. The workouts were at least 2.5 hours long, and included 30 minutes of cardio. I was stupid.
(Between December 1993 and December 1996, I worked in Jeddah, Saudi Arabia. For 2 of those years, I worked out at King Fahd Coastal City Gym. The gym manager actually asked me to participate in a local bodybuilding competition that was to take place. I declined, and rightly so, because not too long after, within a matter of days or so, I saw a couple of guys at the gym who were obvious steroid users and who would have made me into a "before" picture. Guy's gotta know his limitations.

)
I maintained that routine and similar volumes until 2005, when I decided to do whole body twice a week. I was still in the lower to mid-140s and I still held on to too much volume. But it became too much for me to handle. It felt like too much well before then, but it eventually became unsustainable. It was in 2012 that I went to whole body 3 times a week but with considerably less volume. And after that I slowly began ratcheting down both the volume and frequency.
So, yeah, I lost weight and size, but I'm also 60 now and whereas I could get away with too much exercise, and eating almost anything within reason when I was younger, I have to be more circumspect now. Don't worry, you'll find out for yourself in due course. You'll still be able to go hard, even all out, just not as often and you'll need more time to recover. Consider the parallel with heavy partying in your youth.
Regarding the volume and frequency thing, I may well be underdoing it now for all I know. But I was certainly overdoing it then. I suspect I began reducing the volume/frequency when the body begins to experience an inevitable drop-off, so to speak, so I think I would have begun to lose some size anyway. And if I tried to maintain my old volume, I'd have probably been ground to dust by now. But I will note that reducing my frequency from twice a week to once a week with the reduced volume did not meaningfully alter my body composition. And so, do I want to increase the effort by 100% for a couple of percentage points, if that? Hell, no.
And, if I may say so, I still look better and work harder than anyone even close to my age in the gym and most of the people there half my age. I have a pretty good "V" especially when I have a pump going, and I can see my abs in the mirror when I tuck in my t-shirt. And I still get the occasional compliment. But no one asks if I'm on steroids anymore.