Ok, agree on everything already said. On the positive side, the mitering looks pretty good. That is a start in the right direction.
Would also agree that it may be time to invest in a real brazing kit... they start about $200 on Amazon for what it called a "Portable Welding Kit" which includes the 10/20 cubic foot tanks and torches with a carrying rack. Here is a starter URL - Recommend a real Victor unit...and you will see some of those at the bottom of this add for their off-brand offering:
http://www.amazon.com/Thermadyne-038...I1KGGEDECTG914
/K
On the side, it may be almost unfair to toss out some pix of "fillets by Dave"...just saying!