One of the difficulties I've had is the proper wedging of SPD mountain bike style cleats. There are plastic inserts (wedges) made for under the cleat (in the shoe can also be used if there's room). The problem is that the two hole cleat has a very small contact patch with the shoe. Once you put a plastic wedge under the cleat, care must be taken to get the cleat screws very tight in order to ensure that the cleat doesn't move under the constant pounding of hard Mtb riding (not as big of a problem for casual use off-road, or on-road use). Well, my friends at Bike Fit have come up with a better solution that will be available in about 8 weeks. It's a metal cleat that has the typically needed varus tilt casted into it. No worries here about plastic wedges deforming or slipping. This will be another great option for getting clients that use the Shimano SPD 2 hole cleat properly fitted.