I personally have never seen bipes do IMAC. I'm not saying they can't...I've just never seen any compete or fly IMAC. Let me give you a couple of links to look at as a starting plane for IMAC Basic compitition that you can successfully compete with and won't kill your pocket book in the process.

I did the AeroWorks YAK 54 QB with an OS1.60 (glow) at first and a couple of my friends did the same thing. Craig started and did well with the Great Planes Extra 300s 1.60 running an OS 1.60 (glow)...Leon did the Great Planes Sukhoi 31 with the OS 1.60. (glow) all these planes work fine to get into the basic competition and learn with.

Here are the links...

[link=http://www.aero-works.net/store/detail.aspx?ID=288]AeroWorks YAK 54 QB 1.20[/link]

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXRXR1&P=0]GP Sukhoi 31[/link]

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXEUP9&P=0]GP Extra 300S[/link]

[link=http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXUM83&P=0]OS 1.60 Glow Engine [/link]

Again these all will get you going in IMAC Basic and will let you learn while competing and having fun! Check em out! [8D]