I want to get a pen that I can inject a 5ml CO2 syringe into. All the pens I've tried have not worked very good or have tasted like garbage. I've had a bunch of cheap ones from headshops and I bought an ophos that used an omicron cart. That worked at first but just kept getting clogged and not working. Don't want an o.pen or anything that cheap but I do want it to be under 75 if possible. What would you guys recommend?