I've written about this a few times, but yeah, that's exactly what I did. I did a cycle in Jan, starting bw of 205 and got up to 235 or so and when I came off, with some pretty standard pct, I lost weight and ended up at 210 lbs. That wasn't cool! I used sarms AFTER pct right up to my next cycle at 75 mg per day 5 days per week for about 5-6 weeks. I lost 3-4 lbs of fat- at least- and gained 2-3 or more lbs of muscle. Basically it helpe me recomposition.
Like I say, I ran s4 right up till my next cycle. This time I did a very similar cycle, got up to around 240 lbs, but when I came off I used: clomid 50 mg/day, s4 50 mg/day/5 x week, and DHEA (for mood etc). Instead of plummeting to 210 lbs like I did before I only lost my testosterone water weight, dropped to around 230-232 or so. After pct I kept running the sarms. My libido came back as "normal" post cycle, everything was normal except I retained a great amount of size! I ran s4 right up to my next cycle... again.
This is probably how I'll do it. My balls come back to full size as they normally do, without hcg. I do NOT think s4 helps in HPTA recovery, but that mine is recovering despite the s4. Side by side, a pct for me, as far as I can tell about the size of my testes, sex drive, energy levels etc. is the same with or without s4, only difference is s4 helps me retain ALL gains- besides water. Or, at least that is the case thus far. I don't want to be without sarms!
Also, I had no vision trouble to speak of at 50 mg/day and only slight at 75mg-100mg. But, I've heard from others who had trouble at 50 mg, but went away 3 days after stopping.