i have the spoon gears which are made by toda and are EXACTLY the same. they are excellent, there is no way the bolts could slip in my opinion, the screws are knurled to finger tighten while doing adjustments when the springs want to rotate the cam. they hold quite well just finger tightened. they fit perfect, i thought i would have to use a 3 jaw to pull them off but they slid off like butter. supplied with grade 10.9 center bolts and thick ass washers. better than a factory fit.
i like skunk2 products but not all of them, the cam gear timing marks do not represent anything, or they are way off. is it poor engineering? i dont know, its possible that the an error could have been made when checking with a degree wheel. this is my only experience with those gears though.