When using the plunge router, it is very difficult to change bits without removing the rotary tool from the router frame. Besides being hard to push in the stop button, the wrench handle seems to always align itself so that a sufficient amount of turn can be applied to loosen the nut and change bits.
I have found a small wrench that fits the nut and has an offset handle , enabeling one to loosen the nut and change bits without removing the whole tool. The modified handle would not detract from the wrench's use for normal conditions.
I hope this can be offered as a replacement or as an accessory item.