OK, next is touching on the correct fuel taps,

All model 4's had the "Cigar" type fuel tap up until the introduction of the Model 5 series 1.

the confirmed correct type of tap is the type on the left with the hex nut top and bottom and the full Knerl for grip, the one on the right is a aftermarket fuel tap often seen on ebay, it has a differnt knerl & a wire CirClip type retainer on the lower half of the tap body.

[Linked Image]


the third type is yet to be confirmed as an original but was found on an original example of a model 4. It has the same knerl but has a wire CirClip type retainer on the lower half of the tap body.

[Linked Image]
[Linked Image]


If you dont make a mess you aint making anything.