The computer desk cat containment system looked a little on the small side.
We have, at some expense, invested in an Apple product which is of course twice the price of normal cardboard boxes and will probably spontaneously combust the day after the warranty expires, but it does have additional cat volume acceptance protocols; and Tiki seems to like it.
We are now looking at investing in an iLitter_tray, or using SWMBO’s description, iShit_box.