I've started my 2nd S4 cycle along with Albutrol and here's what I found so far.
If you read my last log, my vision side came after 2 1/2 days at 50mg per day. This time, since I'm more interested in Albutrol, I've decided to play with S4 dosage a bit. I've started Albutrol about week or so ahead of S4.
I've started my S4 dosage at 15mg per day x 1. At this dosage, I didn't get any sides after 1 week.
After 1 week, I've increased my dosage to 25mg, the vision side came on fast (next day - tint, slightly darker overall). Stayed 25mg per day for 2 days.
Dropped back down to 15mg and vision side is gone or is nearly gone (too little to notice if its there). So 15mg seems to be my sweet spot for not having vision sides.
At 15mg per day, is there any effect? Yes - although it took longer to feel any thing - my libido (which was killed by albutrol) and strength seems to be coming back. Its not as strong like the last time (where I was taking over 100-125mg per day near the end) but as long as I feel the effect, not having vision side is huge enough for me to go for couple of month or even longer cycle (will get blood work done after 2 month).