Cooling simulations to date have modeled absorber regions with flat end windows. However, practical absorber cells will almost certainly have rounded windows. We examine the cooling performance of two recent cooling lattices using flat and hemispherical end windows. We find no significant difference in transmission, transverse cooling, or longitudinal heating. Posted muc0084.pdf to WWW URL http://www-mucool.fnal.gov/mcnotes/muc0084.pdf Posted by fernow