I'm guessing you will gain something between 8 and 15 pounds of muscle. I took Deca-Drol Max at 3 caps a day for a month for my first cycle, I stacked it with 2 other PHs. One week into my cycle I started taking an Estrogen Blocker aka Aromatase Inhibitor (AI). I did this because of what I read about Deca online. I looked at the Deca Drol Max stack you're talking about and I see it comes with a bottle of E-Control which is an Aromatase Inhibitor (AI). This is what I think you should do, I think you should start popping 1 cap of E-control a day the second week of the cycle, and then increase it to 2 caps of E-control a day for the 4th week. If you do that you will still have 62 caps of E-control left when you run out of Deca and end the forth week. Now according to the way this site has this Deca stack planned "LAST 4 WEEKS: E-Control Rx - 3 caps daily (last 3 weeks)" you would only need 63 caps of E-Control, that's just 1 cap off of what you would have left if you started taking them with the Deca like I think you should do, that 1 cap short wont make much of a difference.
So with the gear you have (Decal-Drol Max Stack) I think you should run it like this.
FIRST 4 WEEKS:
Deca-Drol Max - 3 caps daily (1 cap taken 3 times daily)
4-Andro Rx™ - 2 caps daily
Ultra Male Rx - 1 cap daily
E-contro1 - 1 cap daily 2nd and 3rd week. 2 caps daily 4th week.
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LAST 4 WEEKS:
Ultra Male Rx - 1 cap daily
E-Control Rx - 3 caps daily (last 3 weeks)
You see I'm only making one small modification to the original cycle plan, which is to start taking an Aromatase Inhibitor (E-Control IS a Aromatase Inhibitor) while taking the Deca and 4-andro. And since E-control comes with 90 caps per bottle you can do what I suggested without having to buy another bottle.
btw I cant read if the 4-ando is 60 caps or 90 caps per bottle, if it's 90 then take 3 of those a day instead of just 2.