The Vahsen group at the University Hawaii has previously developed compact TPCs which have been succesfully implemented to characterize the fast-neutron flux in the Belle II detector at the SuperKEKB electron positron collider. They are now implementing their detection principle in larger TPCs in order to investigate electron rejection, gas optimization, and readout systems for the purpose of directional dark matter searches, measurements of coherent neutrino-nucleus scattering, and other experiments requiring precise detection of nuclear recoils.