My standoffs are made from 3/4" aluminum bar, drilled out to let my 10X322 bolt slide throuth and then machined down a little in the center to remove additional weight. Heck...I weighed the standoffs on a digital scale and together they weighed less than an ounce and along with the glass filled engine mount you're talking about 6oz total for the engine mount. Don't quote me on the exact weight but I know it's ounces less than the Hangar 9 and three or four ounces that far forward makes a lot of difference