There is a reason why Sony eliminated the pots inside their monitor.1. Most people don't like to wear rubber gloves against electric shocks all the time when they need to adjust a monitors.2. WinDAS would allow general quick software fixes when all monitors would have suffered from the same misadjustment during warranty time (unfortunately Sony seems to ignore what happens after).3. (MOST IMPORTANT) Circuit temperature drifts differently when the case is closed, so you would need to do fine tuning with closed case (or open and close it every few minutes) which can be really awkward.
In the CRT FAQ the mention that late Trinitron tubes convergence and purity was adjusted in factory by magnetizing parts inside (or on the back?) of the tube in special ways, and they warn never to degauss such CRTs with a too strong external coil or from the back because this can erase the magnetic adjustment and make them unusable.
I am still musing where the "colour return" data is stored (not in the WinDAS file) and what it changes. May it be something magnetic???
Short of decreasing the refresh rate, there is no way. Here it's the other way round - the P1130 is sharper. It's simply due to the number of power-on hours each tube has.
I guess what Th3_Un1qu3 got is probably either an engineering sample/ early production batch or one modified by a reseller (using such convergence device or even the whole tube assembly from a P1110). Th3_Un1qu3, please tell me the date/place of manufacture of your p1130 set, which is printed on its back.
September 2003, Mexico.