if you have room under there and it was mine, I'd bend a piece of tube and make a crossmember and swing those lowers in at the frame. Did you happen to look at mine at the hammers? dual tri and it did awesome I was very happy with the way it performed. oh yeah you have the gas tank to deal with still & thats why you went single tri with straight lowers? are your uppers adjustable? if so start playing with location. I thought your runner did well but I wasnt in the seat
edit: is that your gas tank in the back?