No, my single tonguing for standard attack is a straightforward Arban 'tu' with my tongue (not the tip!) trapping air at the front of my palate. Maybe rolling back towards the palatial ridge for a softer 'du-du-du' attack. But for 'ku', my tongue's nowhere near the roof of my mouth so no stop and no release. 'ki-ki-ki' seems to get something near the back of my palate, but just feels weird.