Earlcus , I had little help from the ouside world as well . Plenty of encouragement but not much else . I basically kept looking at youtube clips like mine and built it with some things i had and a little bought stuff . The travel of the cradle one way or the other was easy with a 12 volt wiper motor with a switch that would allow me to revers poles for one way or another . Talk to a electronics geek for that on how to . The rest i just looked at all the others and used a little from all to come up with this little thing . My freind is building one with a router and i guesse ill go that way if his finish is beter then what i get . All basic machenics really ,Look and look again . My Drill drive is a 12 volt cordless with a 240 volt ac to 4.5 volt dc power suply hard wired in . Simple as trial and error . I made a lot of mistakes along the way but i stuck to it till the end . Dont let it beat you .
Hope this helps and ask if you need help some more and ill try to help if no one else will .
Cheers FLASH