Changing Tubes In the Buffer

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Changing Tubes In the Buffer
« on: 16 Aug 2012, 11:47 am »
Hi All,

After much mucking around I finally went ahead and ordered the Psvane 12AU7-T tubes for the buffer.

I've managed to remove the stock JJ, but am now having trouble getting the new tube in place.  I've lined all the pins up, but as I'm trying to push the tube in they don't got very far into the white plastic ring. 

My question is, should the pins go all the way in so that the tube base sits flush(ish) against the plastic ring?