If getting lean is your goal, why not skip the sdrol and use a fat burner like clen? This will help you to get leaner and in better shape for your vacation. Then I would use the winstrol toward the end of the cycle, to harden up more and show of the conditioning you have worked for through the cycle, using your diet, cardio and clen. Something like this :
1-12
Test Cyp 750mg
adex .5mg EOD or more as needed
clen starting at 40mg and adding 20mcg about every 2 wks, going no higher than 120mcg
7-12
winstrol 50mg ED
Boom! Lean and mean for vacation! Dont forget to run a PCT