I am looking at the twin Transall C-160 but the specs are, at least for a newbie like me, a little hard to decifer. I want the larger engines but cant find anything to match the specs listed as 4c 0.30 x 2 cu in . Can anyone educate me on what the heck they are asking for? Any help locating a 7 channel radio would be awesome also. I want to add the retractables.