Great job on the convincing part, you gotta let me know what you said 
1. Hell ya, just syfone it in the 72 before you put it in the 180g
2. I dont have much exp. in separated systems like yours, but magdrives are very powerful. You might need to go with an external pump that is strong enough for the job.
3. As stated above, exp. you would either have to make a smooth flow or a J shape trap. You may want to pm Tangster about Q's 2 &3.
4. Your new tank has to go through a cycle, thats just normal. Luna _________ 9YR OLD 90G/55g custom sump/refug Mag18 Aquac 180skimmer 692w MH AC jr,yel&kole tang,midas&convict blenny,B&G chromies,Blk/yel fin chromie blackcap,nemo,neon goby,6line; Blastomussa Merleti,Acan ,BUBBLE,Torch,LTA, Acropora(2) Moon, assort zoas, yel& G star polyps, P&B ricordia, montiporas, cup&candy corals, xenias,B/G mush,flower ane(2), cherry red mussa, dusters,cleaning crew..  |