i recieved my gantry kit 2nd hand sorta. my brother purchased and lost interest/money in finishing assembly. so after a year and a half sitting in a spare room i took everything to my house and started assembling. mechanically the table and gantry are now done. no electronics/motors installed yet. I'm missing peices and cannot find them at my brothers house. is there a way i can order a few small parts. mainly the wipers that go on the trucks. i have a pair. think i need 2 more pair. and I'm confused on why i have 5 servo motors? isn't there only supposed to be 4? also the cable guides i see mentioned in the instructions on here are nowhere to be found. not sure if I'm supposed to have them or not.