Like I said above, the DW in the pic above is mine, it only collapses down to 3.5". I should have added, they make a couple different models, mine is theBill I have the DW I love is great it goes lower and extra support and it also comes with diff adapters for type of jobs!
Your bikes sit on those nice and stable? Do you do anything to make sure the bike is sturdy? Here the lift I put together this winter, it's an old car lift and I got a piece of 3/8's plate from work and bolted it down. I'd really like an option to lift the tires off too.