AutoZone has flasher relays.that's where i got mine only because i didn't want to wait for shipping.i think it was like $1-2 more than Ebay.same as a car flasher.i also put l.e.d. Lights on mine and it still flashes
I made a box out of 4x4 to set it on.the come along is just there for extra support and to get it on and off the box.its only about 900lb if it does fall on me.