Stuck on building a Huxley hotend.

I'm building a RepRapPro Huxley.

I'm supposed to fit a piece of 3mm dia tube into the stainless steel barrel.
However the hole in the barrel is only 2mm dia.
Am I doing something wrong?

Are you following on-line instructions? Can you post the link that says there should be a 3mm PTFE sleeve inserted?
Looks like there should be a smaller sleeve inserted to that 2mm hole.
Where did you buy the kit? You might drop them an email. I'm sure they will clarify quickly.
Was there any 2mm PTFE in the kit?

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Thanks for your reply. It turns out that I had the barrel the wrong way round in the block! The other end has a bigger hole