well about a month ago ( i had wiped this horrible experience from my memory) I had an experience with valve stem extensions.
I have had trouble trying to get the air gun from the servo onto the valve to keep the air up.

On my old bike I had no problems with the 90 deg angle extension ...... not so on the STeed!
Driving along the Bruce on the Sunny coast I had a feeling the handeling was not quite right so I pulled over and noted that I had a F*&king flat front tyre.

I had been doing a 'little' over the speed limit of 110kph so was a little gratefull that I had the foresight to stop at the slightest mishandeling.

After seeing I was (thank God/Allah/Budda/Tree God/ess or the patron saint of ST riders) only 100 meters from the servo at Ettamoga pub.

i moved it with much grunting and groaning
Down I went to the air compressor so I could put in enough air to move to a safer location ( near the pub) to wait for the wife to come and rescue me.
I noted that the tyre was staying inflated .... WTF???? ...... so I then decided to see if I could put the correct preasure and when I pushed on the valve air suddenly startded whooshing out of the valve base along the rim!
HUH????

I then came to the conclusion that the weight of the attachment was bending the rubber valve stem due to the centrifical forces of a slightly faster than recomended speed and this was allowing the air to escape from the base.
Filled it up to correct preasure and off I went back to Forrest Glen for an experiement. No loss in preasure when I took the attachments off.
I now no longer leave the valve attachments on the bike and just keep one in my pie warmer for that possability of a need at an 'old fashion' servo.
Lesson learned but one I wish I had seen or read about elsewhere before that day.
What do other STeed riders use to help with the servo tyre inflation problems?