So I started the holesaw mod on my 2006 VLX, and everything has gone to plan so far. After drilling the top pipe out, I was contemplating how to drill the bottom one (it's an awkward angle) and then my dad stopped by and suggested I start it up as is, to see if it's loud enough already. I did that and it sounds great, but I'm wondering if there will be any negative effects from this. I was told it will just create uneven backpressure but cause no damage to the engine. If I can, I'd like to just leave it one hole normal, one hole drilled out.