I've a very old Specialized Rockhopper that was built with horizontal dropouts. I've used it as a fixie for winters and as a townie for years. Because the frame has 135mm dropouts and the flip/flop hub axle can only go to 130mm, I've been using a quick release. I don't like the QR because the hub can slip when climbing a tough hill under torque and just because it is much harder to adjust chain tension. With a QR, I can not tighten bolts on either side one at a time to "walk" the hub into place. Does anyone have any experience with swapping out an axle that takes a QR and substituting a solid bolt-on axle? If I can do that swap, I can cold set the dropouts down to 130mm to make it work. If relevant, the hub is a Sovos cup and cone type.