umm to be honest i can't say, lots of people have got skyrunners and had next to no problems, but others have got them and broken them pretty quickly, so i can't say either way, if i did then you could hold me responsible for you getting injured or something, and i've got enough to deal with without stuff like that.
...you could try looking on ebay for some pro-jumps, though be careful there, i got some second hand PJ's for £90 off ebay, and they're not bad, though the springs were pretty soft...and the feet wore through pretty quick, i dunno, it's worth a try, but there's lots of dodgy sellers on ebay, so be careful if you decide to...how much are skyrunners anyway?