LoL I had the same stats as you when I was your age .... I'm 235 now, just stick with heavy compound moves and train for power for a few years and you will get that jacked back you are looking for.
If you want to get rid of the yellow dye just recrystallize your fina.
I hate extracting AS with methanol .... it just sucks. You get the AS and a fair amount of the binders too.
I use diethyl ether to extract, you get a minimal amount of methylcellulose with it, and most AS's are very...