We have a great deal of freedom in choosing how to distribute PEFs in the data coordinates, and in choosing how to implement the smoother between PEFs. Choosing the web-like arrangement of micropatches and smoothing PEFs in radial coordinates gives a nice flat smoother response, and the ability to use relatively large micropatches without trouble related to nonstationarity. The large size of the micropatches calls into question whether smoothing is actually necessary. It turns out that, especially where data are noisy, smoothing continues to be important.