  We examine the feasibility of creating and measuring large relative number
squeezing in multicomponent trapped Bose-Einstein condensates. In the absence
of multimode effects, this squeezing can be arbitrarily large for arbitrarily
large condensates, but a range of processes limit the measurable squeezing in
realistic trap configurations. We examine these processes, and suggest methods
to mitigate them. We conclude that high levels of squeezing with large numbers
of atoms is feasible, but can realistically only be achieved in particular trap
geometries. We also introduce a method of maximising the measurable squeezing
by using a $\pi$-pulse during the process to improve spatial mode-matching.
