I am thinking about getting the new end cap/ foster valve for my QB78 and investing in a scuba tank for HPA refills.

Can someone here please help me get a list together of everything I will need (valves, gauges, transfer hoses ect ect)

How many PSI will the stock tube SAFELY hold?

Are extended tubes that hold up to 3000 PSI still available?

Lots of questions. I am in no rush but want to educate myself a bit more.

Thanks all.