Get the size "O" gelcaps, just don't fill them all the way (the 500mg-600mg ones). I would also recommend a scale. Fill a plastic bag with your 4AD, add in the necessary filler (corn starch) [weigh both beforehand] so that you'll have a total mixture of "X" (your Gs of 4AD) + however many mgs/grams of filler you need to make up the difference to fill 50 caps (the whole rack) with 500mg of 'active.'
Once you've got everything weighed & put in the bag, close it and shake the hell out of it so you get an even mixture, spread over your Cap-em-Quick, and cap. Then repeat with your
1,4 Andro.
I can be more clear if you need me to, just let me know if I 'shirked' on the explanation anywhere...