Got this to replace a worn out Topeak Joe Blow track pump last year.
Whatever I do I can't get the head to engage properly on presta valves. From starting pumping a flat tube air seems to route out thru the schraeder hole or vent back into the pump.
Not the original owner (although was BNIB) so no chance of warranty. Saw similar comments about it doing this somewhere else.
Got fed up and have replaced it with a Spesh one. Anyone had similar problems with / a fix for the Blackburn? Reluctant to blow (ho ho) more cash on replacement heads / tubes.
Topeak was no probs; pop it on, twist lever and lovely, shame the valve gave out and I bent the shaft.
Had the head apart on the Blackburn but nothing seems worn out or the obvious cause.
Bugger 
and it still doesn't operate properly. I had heard similar from someone else.
