as long as you train hard and eat right you will keep most of your gains, oh yea pct is huge as well. unless you are way past your genetic limit you will be able to keep most gains. i don't know if its cause it got bigger or what but i never had veins in my bi's until i did my first cycle, ive kept them for a long as time. ive come off for a while and never lost the veins. i just started eq so i'll see if i get more veins and if i lose them or not.