B44 rear arms are the softest.

you can see a shelf in the pics of his car. its not on the strap.

Says that person that didn't start a sentence with a capital, or end with a period.

Here is the titanium shelf that I am using in my B4's and T4... We use .063" Ti on some projects so the scrap is always available... One man's trash is another man's RC parts.

I actually put the ESC and Receiver on the tray. It allows me to use full size and shorty packs. I will get a pic of it with everything mounted here shortly...

I am now a professional plastic bag opener

The rubbing occurs if you build the 4.2 per the directions of the kit with the updated rear tower. Not based off the directions that come with the big bore spring kits with spacers. The arm flexes on landings of jumps and scraps the bottom shock cap and the lower end of the body. The fix which should end up as an addendum to the manual was posted a page or two back. You can also just use additional spacers on the bottom and live with the shocks angled backwards which looks odd. Either way works and will prevent the camber link from rubbing.

I believe it's B4 carbon arms then B44 arms the standard B4 arms as in from stiffest to softest.

See the plastic shelf with the counter sunk screws on the rear brace. The lipo strap slides under this shelf.

I said grammar not punctuation. Does this make you happier? At least i know how to write a proper sentence.

These could be a nice fix. It's the shock pivot ball with integrated spacer from Yaiba Racing.

yeah, I can see something is there. still kinda looks like the battery strap is hitting the esc. might just be the angle of the pic

Angle of the pic. Looks like a rear T brace cut down and used like someone else mentioned. You can use the existing screw holes also.. no measuring/drilling.

if you use a flat piece (cf... plastic) and not the t-plate, you will want to put a 1mm or 2mm spacer in between the u-brace and the esc-plate.

do you see a bo bo lol