I race track extensively and do a lot of workouts with a track frame on a trainer. I've tried most of them and the one that really stands out is the 1-Up. It's beautifully made, compact, no hydraulic fluid (so you don't get leaks), and superb road feel. The axle fixtures are simple conical cups with deep recesses at the bottom, so they seat nicely on the track nuts and let any axle that protrudes simply insert further into the cups. Better quality domed track nuts work better than cheap junk track nuts, so I'd encourage you to get some Dura Ace rear nuts for the firmest fit. And these cups were made for Phil Wood hubs -- just get the BMX conical stainless track nut washers and they fit the trainer like it was machined for them. The 1-Up is also quiet enough that you can use it indoors without waking everyone up. It comes with a 30-day no-obligation return privilege, and their service is absolutely superb (I had a problem after two years and they immediately sent me a whole new flywheel assembly).