Hello; This is fantastic! This rc excavator has power. So is it possible to create a rc excavator that will be using gas fuel like any excavator Yes, but a combustion engine in that Size has a very high engine speed at rated Power. So you need a very big gearbox for it. And the sound does not fit to an excavator. It is pretty slow Do you need to put a bigger pump Or maybe servos could be stronger Please don't get me wrong Your machine is Awesome, beautifully made spot on! I just think that the movements could be more realistic!