Which kit, JOOI? I was just looking at a few the other week.
My boy's got a science project thing coming up at school and is doing stuff with catapults (seeing how varying the throwing arm affects the distance of the projectile or somesuch), so he wanted to buy a kit. But then there's no fun in that for me ;-)
There's nothing but fields and trees behind our house for miles. If any telegraph poles ever fall into my lap... :-) Ever seen the "full-size" one at Warwick castle? Pretty impressive.
I'll see what I can do when I'm nearer finishing - I was just prototyping yesterday and trying to see which of the rope (for the onager) I had handy was workable. It's only going to be about 5" high and 10" long, but seems to be able to deliver a heck of a kick even then (I wouldn't fancy getting a finger in the way of the arm!)
I'm keeping it pretty simple (the frame's all 1/2"x1/2" stock) because I want to take it to bits afterwards and copy the parts so I can make a 'kit' that the lad can then build - but I'm very tempted to make a more "period" (and slightly larger, maybe 12" high) one afterwards.
cheers
Jules