Technical

Hello all, I'm hoping someone can help. I recently bought a fairly well used Mallard A4 but upon steaming for the first time, I found the steam just flooding the cab.

I've bought the replacement silicone link tube from here but I just can't fit it. The tube clamp rings are seized on to the banjos. I've tried brute force, wd40, nothing seems to help get them to unscrew. I've lost that much skin on my fingers from the clamp rings, I could probably go on a crime spree and leave no fingerprints.

Am I missing something or am I just the unlucky one with clamps that won't come off? If they have seized, is there somewhere I can get replacements? I didn't see any in the shop on the site.

Many thanks in advance.

David