I do, on both Yom Kippur and Tisha B’Av. Yom Kippur is much more challenging cause of both the whole shul/davening thing and cause I’m not so comfortable checking real often and playing around with the pump temp basal etc. (chilul yom tov on yom kippur doesn’t feel that great)
On the other hand, Tisha B’av is more relaxing, not obligated to do anything and I can play with the pump/check BG often. In addition, in back of my mind I know I can break the fast at any time…
Your getting me nervous for Tisha B’av though, anyone have any good ideas? Anyone else fasting?