You'll waste your time with that set and Kenny's right - it's gonna cost you more in the long run and from your description it does'nt sound like it's worth the investment in money and time.
Plus, brazing is a forgotten art and starts with proper joint design, fitup and prep - otherwise you'll lose a lot of strength and your kart'll fall apart on the first bump. There's a myth out there that MIG, brazing, stick is easy - it's easy to start off but real difficult to get expert in - nothing in this or at least my life is easy.
I regularly do OA and pay thro my teeth to maintain my set coz the versatility of OA cannot be beaten in my opinion but honestly I think you gonna hit a brick wall with that set.
But I've been known to be wrong and I hope I did'nt come on too strong, sir and best of luck.
You do know that brazing rods are more expensive than arc rods and they go just as fast?