  Tadpole cancellation in Sen limits in F-theory was recently studied by Aluffi
and Esole. We extend their results, generalizing the elliptic fibrations they
used and obtaining a new case of universal tadpole cancellation, at least
numerically. We could not find an actual Sen limit having the correct brane
content, and we argue that such a limit may not exist. We also give a uniform
description of the fibration used by Aluffi and Esole as well as a new, simple,
fibration which has non-Kodaira type fibers.
