Actually, there are some versions that have a plastic tank/mount assembly. It makes it longer than a Cox Babe-Bee or Black Widow type. For C/L, a Norvel is an awesome powerhouse, no mixed reviews about it! I put a Big Mig .061 on a Sig Skyray with a 6 x 3 Master Airscrew and couldn't believe how fast it went. I since went back to an old Golden Bee to slow it down.

Phil

Edit: See here [link=http://www.sigmfg.com/cgi-bin/dpsmart.exe/MainMenuFV4.html?E+Sig]http://www.sigmfg.com/cgi-bin/dpsmart.exe/MainMenuFV4.html?E+Sig[/link]

Edit number 2: I tried to give you a link to the "BigMig Start'up .061 C/L" but I only seem to get the main menu at Sig in my address bar, but you can find it by clicking Engines, Norvel, C/L engines and then BigMig Start'up .061 C/L on the left side of the page.