Well worth buying in my opinion, good price, hopefully save some weight and for road use would hope address my concerns about poor braking performance.
I doubt they will manage track work and I’m at a loss to why they haven’t used a grooved or dimpled disk though, almost guarantee on track they will warp after heavy use. In the 90’s when I was tracking my EK9 on solid disks, had constant issues, me and a chap who used to run his DC2 on slicks got a batch heat treated them but in the end gave up and had to get encourage a manufacturer to make up sets with grooves and dimples, had 0 issues after that.