adding

I am doing a sust cycle 500mgs a wk for 10 wks. I am looking to add something midway through does anybody have any suggestions?

dbol or fina or winny--depends on your goals

by adding winsrol will I still gain the same amount of muscle and just be more ripped than just the sust alone or will I not get as big and when should I add the winsrol and at what dosage?

adding another steroid will never limit your lean mass gains from other steroids. You want to add something to a sust cycle, I would drop the sust around week 6 or so and switch to prop to speed up your recovery during post-cycle. Then you could add the winstrol in to go with the prop, example:

Week 1-6 sust 500mg/week
Week 6-10 prop 50mg/day
Week 6-10 winny 50mg/day

could also use the extra sust you would have left to increase the dose weeks 1-6...or just save uuntil next time

just my .02cts I think you should run the sust @ 250mg every 3 days or you will spike your blood levels this means more acne and irritability just a thought but I say add the winny and as for when I wouls say starting weeks 7, 8 , 9 and 10 50mg ed

good luck !