All it takes is 1 over inflation to spoil the latex. I haven't done it yet, but I plan on converting my Cyclon .061 to backplate pressure and just use Hayes 1 oz tanks for 1/2A.
The tubing has a shelf life, so the freshness is an unknown variable. Good stuff should last for at least 5 or 6 flights.
A good habit is to toss the latex at the end of the day so you aren't tempted to reuse it the next time you go fly.
If you over fill the bladder, the high pressure at the beginning of the run can fool you. You set the needle for what you think is rich enough, then once the plane is launched the bladder empties out enough for a pressure drop. When this happens, the engine suffers, you suffer, C/L flyers will belly land under power to save the engine if this happens.
With case pressure, bad needle settings have been much more rare around here. The needle is much less critical and the pressure is more constant.
Last edited by combatpigg; 11-12-2014 at 07:58 PM.