I have anavar 10 mg per pill and according to what I read, its effective dosage is .125mg per pound so for me 23mg per day...but I would just take 30mg. If Var is a cutting and fat burning product.....what happens if you follow a good diet with lots of calories plus weight gainers during the cycle? I weigh 185lbs and my bodyfat is about 12% I dont want to gain lots of weight, but a few pounds of meat would be nice. Also my worst nightmare would be not being able to get it up after the cycle so would Nolvadex be enough to prevent ball shrinkage etc...?
Steroids aren't used so much for their "fat burning" qualities during a cut as they are to maintain muscle-mass during a cut. The evidence that Anavar is a "fat burner" is pretty limited. Not that it doesn't happen at all, but probably not to the degree that you think it might. Put simply, you're not going to shed fat by taking 30mg of Var and eating a surplus of calories. Sorry, it isn't magic.
Whether or not you're using AAS, a cutting cycle is still fundamentally the same. In other words, you'd run the cutting cycle just as you would any other cutting cycle, except since you're using AAS you will keep more muscle mass than without AAS. So, to state the obvious, don't expect to shed a lot of (or any) fat if you are maintaining a diet with "lots of calories" and "weight gainers". Everyone has their own idea of what the optimal cutting cycle layout is. Of course, the one aspect of a cutting cycle that is hardly debatable if you want significant fat loss to occur - you need to create a calorie deficit.
Furthermore, I don't know where you read that the effective dosage is .125mg/lb, but that is pretty low. If you read what people have to say who have experience with Var, pretty consistently they say the effects are best at 60-100mg/day. Don't expect a whole lot with 30mg/day for a month.
As for ball shrinkage, tamoxifen won't "keep" them from shrinking. On such a short cycle consisting of only Anavar, you
might not experience shrinkage. hCG on cycle dosed at 250iu once every 3-4 days is the best way to keep your balls full sized. Read more about this by googling the SWALE hCG protocol.
You'll still need tamoxifen, or rather a SERM, for an adequate PCT protocol. I'll assume you at least did SOME research and knew that already. If you are very concerned about being able to perform, you might want to snag up some viagra or cialis because without an aromatizable compound included in your cycle (hCG might help here - it does aromatize) expect to have a limp d*ck at least at some point while on cycle.