Patent claims are AND. IANAL, but my understanding is if what you built doesn't match the claims exactly, it's not infringing. So, in this case, using a non-bel

Patent claims are AND. IANAL, but my understanding is if what you built doesn't match the claims exactly, it's not infringing. So, in this case, using a non-belt-driven linear actuator, or using a square rail, or using a two piece base would all be ways of avoiding infringement.