Amendment 0004 adds Not-to-Exceed amounts to CLINs 0003AA, 1003AA, 2003AA, 3003AA, and 4003AA.Amendment 0003 adds a revised PWS and Questions and AnswersAmendment 0002 revises FAR clause 52.212-1, Instructions to offeror and FAR clause 52.212-2, Evaluation. See revised attachments. Amendment 0001 adds a revised PWS. Changes are in yellow. American Elevator Maintenance/Repair. See Attachment 1 - PWS.