Glen you can stop by on Sat if you want, the easiest way would be to get a measuring cup with ml marks on it. I am using a specimen cup that holds 100ml and filling it to 60 ml, then putting the frag in. I just record the difference, you could also get a postage scale to measure weight in grams i suppose.
Get your pics in the deadline to post on MARS is the 15th(mine will be in tomorrow).
Anthony