[RCP57]

I wouldn't make the rear too heavy. I'm sure with your new weight it will be plenty. My Volvo is bigger but only weighs a little over 40# without the 9# battery. Once the battery is in place near the back of the machine it will pick up a fair bit but unfortunately all of the weight being on the rear does not help when digging. My machine will lift up easily when digging down into harder ground. This problem is only compounded when digging uphill on a slope. Unfortunately my track motors are not strong enough for me to add more weight into the undercarriage so I'm screwed.lol