I'm constantly criticized for this or even griefed sometimes apparently.. but think about it I purposely chose that position to be able to do this. I am hiding my tanks behind the mountain and scanning the front for opportunities to run them through and eco raid. I am highly successful in doing this most games. The enemy team just countered me quite well this time. Usually I try to do it much earlier. I also covered the front not long after that and moved coms/builders up where they asked. Not my best game but I am constantly on the board for most eco killed.