I would like general advice on operating a boom lift on uneven ground like slopes. I live on a hillside with about a 15-degree incline and the slope indicator on my 1980 Mark lift 62 foot boom activates when the ground is over 5 degrees incline. So for example when I am just driving the Boom up the hill side, is it better to have the basket uphill from the Boom, even though I would be driving backwards and looking over my shoulder as I'm going up the hill? I suspect that it would be better to have the basket on the uphill side in case the Boom Lift was to lose traction or start sliding down the hill, at least I would be above the Boom Lift, and not below it as it is sliding down hill. Are there any operators manuals I can get or YouTube type videos I could watch to see the safest way of handling a boom lift on uneven ground or a slope?