[OG68]

I carefully tapped a 3/8" drill bit in about an inch to swag the opening.. Extension fit fine.

[Banshman]

Originally Posted by OG68

I carefully tapped a 3/8" drill bit in about an inch to swag the opening.. Extension fit fine.

So you didn't actually spin the drill? You just tapped it in to stretch the tube?

[OG68]

Originally Posted by Banshman

So you didn't actually spin the drill? You just tapped it in to stretch the tube?

Yes. You got to be careful though and support the lower tube while gently tapping with the hammer. Tap it in a bit, rotate the bit and tap some more working your way in. Nice to have an extra set of hands to support the lower tube. It doesn't require much to expand the tube and I was able to press fit the extension with a little effort.

[Banshman]

Great, thanks for all the replies

[Banshman]

Originally Posted by Banshman

Great, thanks for all the replies

So I started as you mentioned, tapping in the drill then twisted with vise grips. I then went to drill on slow speed. I had to keep a wet rag behind tube. I also took a little material off the upper tube with Dremel and sand paper. Fits mint now, lines right up with ac bracket

[Kenth]

Are the tubes the correct length for the indicator rod now?

[Banshman]

Yes the mount lines up to my ac bracket