FUMR
For a T1 diabetic these items are killer items. No T1 that I know would fail to check that they had them after security. It comes to mind easily coz so many airport security people are mighty difficult over carriage of syringes, this funny little machine (insulin pump) and this stuff in a penfil. It's not usually something they walk through absent mindedly.
That fact that carriage of these items and using them within a short time before flying is mandated under the terms of your Class 1 Medical tends to ensure that you have the kit available.
Hence I do not believe that I'm being either harsh nor hasty. You're playing for keeps here mate.