It wouldn't bother me at all if someone decided to start with 400mg of Test/week as opposed to the 500mg in the recommendation.
To the OP, I don't know what other esters are in there but assuming it's got prop and phenylprop, I think your probably going to have to inject EOD which is why the previous posters recs of E or C and probably two times per week pinning would be more convenient.
If you're a smaller guy (for now of course), I'm not totally against starting at 400mg, though.