1) Absolutely no idea
2) OFNA's Violator has a 135 instead of 125
3) Here is a link to Heckler's ramp plans (these are skateboard ramps) Do NOT be a doofus, build (or find) a damn downslope too, jumping to flat land is for 1970's motorcycle jumpers and that Kangaroo Kid quad jumper guy only. It will save your parts, and it looks one hell of a lot better on video.