The carbon slicktop thread

[SQ13]

Yeah I think it’s just for alignment purposes. With the Karb roof, I’m temporarily snapping in the original roof rails, as well as measuring the front and rear edges all the way across, to help make sure it stays square.

I was using a Neiko spot weld cutter and went through 3 bits on one side on top of taking forever. Switched to the Blair spot weld cutter and went through the other 3 sides in like 30 minutes.

https://www.amazon.com/Blair-11096-Cutter-Set/dp/B002XML5HK?th=1

Also used a cheap Harbor Freight bandfile to clean up the surfaces. Made the process super easy.

https://www.harborfreight.com/53-amp...der-58155.html

I did use the Blair bit with a Milwaukee drill and constantly struggled with 1) the bit walking off and 2) having to apply a ton of downward pressure to get it to cut. Maybe I wasn’t doing it right. Would like to hear how you did three sides in 30 mins lol.

Agreed. Belt sander with 3M 80 grit belt was very efficient for removing the protruding spot welds and cleaning up the surfaces, and I would highly recommend it. It would likely work well to grind down the spot welds if using the Blair spot weld drill bit isn’t desired…just need to be careful and not go too deep.

[Sid_E46]

Yeah I think it’s just for alignment purposes. With the Karb roof, I’m temporarily snapping in the original roof rails, as well as measuring the front and rear edges all the way across, to help make sure it stays square.



I did use the Blair bit with a Milwaukee drill and constantly struggled with 1) the bit walking off and 2) having to apply a ton of downward pressure to get it to cut. Maybe I wasn’t doing it right. Would like to hear how you did three sides in 30 mins lol.

Agreed. Belt sander with 3M 80 grit belt was very efficient for removing the protruding spot welds and cleaning up the surfaces, and I would highly recommend it. It would likely work well to grind down the spot welds if using the Blair spot weld drill bit isn’t desired…just need to be careful and not go too deep.

You need to use some cutting fluid and also use relatively light force initially so that the guide bit can have a divot to follow. One the divot is formed, you can press down harder so that the spot weld cutter can make contact with the metal.

[heinzboehmer]

1) the bit walking off

Did you center punch the spot welds? I bet that helps a lot with the walking.

[SQ13]

Lol I did all of the above and still struggled with it. Def not a quick job for me 🙃 i followed the instructions but my technique was probably poor. Glad it’s over now

[bigjae46]

1x1 spread tow roof completed! 5.6lbs. Straight out of the mold, no clear coat. Weighed a slick top roof panel - 18.4 lbs.

It feels a little stiffer than the OE roof when trying to twist the roof diagonally.

[0-60motorsports]

1x1 spread tow roof completed! 5.6lbs. Straight out of the mold, no clear coat. Weighed a slick top roof panel - 18.4 lbs.

It feels a little stiffer than the OE roof when trying to twist the roof diagonally.

That weave looks so sexy! Nice work brother.

[Sid_E46]

Part of me wants to try having the roof painted in a sort of "fade" silver grey. From a distance it would seem to be paint matched to the car, but up-close, the weave shows through.

[Nate047]

Nooooooo leave it

[bigjae46]

For those that used 3M Panel Bond...how many 200ml cartridges did you need?

[Sid_E46]

For those that used 3M Panel Bond...how many 200ml cartridges did you need?

1 was more than enough.

[Cronenberged]

bigjae46 can you show depiction of how similar your CF roof is to the OEM panel.