Opted for a Saris Freedom 2 with a pair of fatbike adapters. Works great -- some sites still show bike limit at 35lbs per, but it's in fact 60lbs per bike and my mini doesn't seem to give it any problems. I went for the no-clamping version, but note that there's only one option to strap the frame tube to the rack upright (just next to the bike hinge) -- but it does work well and at ~$240 seems good value.