Thanks, MABman! Since posting here, I found the pusher subforum on motoredbikes and asked some of the same, but so far no responses. I`ve also seen the price of good batteries since then :0 In light of that awakening, I might just keep an eye out for an .025 or .035 four stroke. Actually, I`ve never pulled my trailer over babyheads, but it`s seen plenty of washboard, so I can imagine. I`ll keep the suspension idea in mind, too.