I built mine last year from scratch,using ideas from this forum and others.Built a mockup out of 2x4's to get the angle on the arms right,then took it to the machine shop for the fabrication in steel.Haven't used it much till the last couple of days,moving crushed stone and regrading the alley out back.Works really slick so far and when I'm done with it I take it apart and hang it on the wall.I use electric actuators,2-18" for the arms,and two-12" on the bucket,controlled with solenoids and an arcade joystick.Lifts 400 lb easy enough.
Wish I could find more things to do with it,it's a blast to use
more pics
Pictures by locknut-1 - Photobucket