lol. yep, it's just that easy! The only difference is the size and weight of what you want to throw.

I can assure you, that 2x4's will not do well to throw a car.

I'm building mine off an Ibeam base (wf10@100), using angle iron (1/2X6X4) crossbraces, square tube (1/2X8X8), supports, and two triads of three wooden electrical poles for the arms. I have been collecting materials for many years now, and have just about everything.

A friend had one, and used to chuck VW bugs 1000 yards out into the lake at his parents cabin. We went diving a number of years later with some lift bags and made an artificial reef with them. His was built with 2 arms instead of one, and was built as a permanent fixture. I want mine to be mobile!