1. MBX-6 T8 1900KV, RX8 ON 4S
2. MBX-5T 1520, MMM ON 5S
3. MBX-5 ONROAD CONVERSION 1515, MMM ON 5S
4. MRX-3 ON ROAD CONVERSION 1512, MMM ON 6S
5. TEN T 2650 T8, MMP ON 3S
4X4 with gear reduction over 100:1 (think tractor pulling) might work, although grass here grows about 3/4" a day so by the end of the week it's about 4" tall. Make sure you don't use a mulching blade. I have a 6.5hp lawnmower and it bogs down in the back yard.
Jeff
Edit: I thought you were talking about a regular lawnmower.
The Warnings & Cautions discussed in this manual cant cover all possible conditions/situations. It must be understood that common sense and caution are factors which cant be built into this product.