backdoorslammer

Working on my first conversion and looking for some feedback. I think I mounted the chassis too far back on the boot and off set from center. It's a size 6 boot so I had to trim the tnuts to fit in the rear mounting holes, hopefully they will have enough a hold back there. I'm a little hesitant to turn the holes into slots to move the chassis up. Would that weaken the boot too much? If I mount it as is will it affect balance and skating technique very much? Imgur link wouldn't embed photos into my post so here's the link: Pics