This is what I have done to mine to get rid of the bellows cut off the flared piece from the filler neck, bought a piece of tube the same size as the piece which passes through the fan housing and brazed it to the filler neck both sides and then use oil resistant hose
I like that. VW obviously weren't confident they'd line up, hence the larger flared tube on the oil filler. Yours looks nice and straight, I guess you don't have a problem getting the dipstick in?
In the end I ended up going for tie wraps, thanks, its made a massive difference ! These pesky bellows can really cause quite an oily mess. H14HPF’s has the ultimate solution above.
Anyone familiar with silicon hose? If you are, do you think a piece sized for the fan housing end would stretch over the wide part on the oil filler? This is why they moved the dipstick on T25's isn't it?