Would second the use of chains, keep the strap's for the 2 buckets. On my 25D I use 5/16 grade 70 with 4 binders, one for each corner. There was just a thread on chaining down the 4 corners with 2 longer chains, but I couldn't find it on myiPad. Get 4 - 15-20' chains and you will be very safe...