Oh my god, Here we go on another quest for nonsense.  Why do we need to
work out the exact length of tracker tubing needed to retube a player?
Is life so boring in MMD land that we have to think up such conundrums?

Nearly 40 years of restoration have taught me that 300 feet is more than
enough and the leftovers, as Nicolas Simons rightly says, go into stock; 
what could be simpler.  How much time has everyone wasted on this one 
when they could have been doing something more constructive like saving 
the whales.

In all my years I've never been asked how much tubing; rather, how much
is it all going to cost.
 
Yours just about to leave for Christmas holiday

Paul Camps