Sounds like a Bengal to me!
When modding the syringe, I find it easiest to remove the plunger, and using a drill bit from the inside that is slightly smaller than this inside diameter of the syringe. 1/32" leaves enough of a lip to still stop the plunger in my experience, but YMMV depending on the plunger style.
We had a 5ml syringe with a fully plastic plunger (no rubber) that was amazing. Eventually lost it and haven’t been able to find a replacement yet, but rubber tipped plunger are fine too, just wear out faster.
For the first half year, I had to escort my now-wife down my hallway with a broom or towel to fend of my cat who did not like sharing me.
And she had several cats of her own. When I warned her up front about my crazy cat, she was so cocky.