Ok so now for your V bar. This is really just here to allow the trap to properly go off with your trigger set up side down. Honestly I'm not sure how to calculate the extra metal length you need so I just add 3/4" to 1" to the length of my bottom bar so in this case is gonna be 7 3/4". Then I mark the middle and bend. Honestly it would be better to just bend a V and keep cutting it till it fits properly and take the measurement but this work too if you don't wanna do all of that.
When it's bent properly you should be able to measure from tip to tip and it should measure the same as you bottom bar.
Now I just take one of the support arm set it how it would be on the trap and make a mark where you feel the V would be good. Honestly I could have brought this one up alot more but you should get the point
Now ,when you get your v set, take your bottom bar and set it under your V ,remember in hard bottom your not going to be able to push past this so it can basically set your height.
Make your marks and be sure to write down your measurements for later use. Measure from your bend down . If you measure from the bottom of the stand up towards you bend your gonna have a different placement for every different length stand you make and it will get irritating. Measuring from the bend down will be a constant.
Ok now that all that is done use a square magnet or what have you to tack your bottom bar to your support arm first. It's harder to square your V then it is for a straight bar
Then just add your V and weld
Again I'm no expert trapper or fabrication dude but hopes this helps somone out