Problems with Knights...

So, I built the first 5 knights already and I knew I was gonna add a second rank to the unit but unfortunately the knights themselves dont like to rank up if mounted to their bases in the back.... So I dont know how I'm gonna get 10 knights ranked up in two ranks without bits sticking farther from the front and back of the bases... Its gonna drive me nuts if I cant get this unit looking halfway decent.... GARRRGH!