Id
I'd probably just go the slin pin route, grab the longest ones you can, if it doesn't go deep enough it will leave a welt for a couple days, I wouldn't reuse syringes oil sitting inside plastic unsealed is asking for bacteria growth, it's not worth having to get an abcess drained or surgically removed, stay safe, get your bloods done and monitor your blood pressure daily, I bought a wrist monitor from Amazon and it is surprisingly accurate and it was like 40 bucks and unless you have some crazy thick wrists it will fit0.70cc a day, 70mg of test/day if I‘m correct.