the engine will load up and die a lot quicker at low idle, especially considering it is a four stroke. However, with a fix it is much better than mounting sideways because of balance issues. you are flyinga cap, which is far more sensitive to these things becuse it does not self correct. i would mount it facing down and get a glow driver. they are a lot more convinient, and if you are low on dough, you can make one. mechanical switches fork great, but you cane also make one. here is a url: http://www.uoguelph.ca/~antoon/gadgets/rc-sw.htm