Stacking Moon Images

I was working with some images from last night, and I was playing around with stacking some images in Registax.  Because I have no clock drive, I'm limited as to the number of frames I can stack, as the features that I want to enhance drift out of the field.  However, I was able to stack about 100 frames on this image:

Notice how smooth Mare Imbrium appears.  This is beginning to show the look that I have been after.  I do have a clock drive in the works, I'm awaiting one component to arrive so I can finish building the controller.