Then I would use what you have and buy a clutch tamer.
Of course if you are going to buy a CT I would contact Grant and verify he thinks a rag disc is ok using his CT. He may suggest a different disc.
I’ve never used a CT but next year I’ll get a chance to tune with one next year. So for tuning advice and what disc to use I’d ask Grant.
If you don’t do an adjustable clutch I suggest you spend the little bit of money on the Clutch Tamer. It will pay for itself and then some the first time you don’t break a gearbox.
@weedburner should get Grant on here to help you out.